Why do we verify the plugin with JDK21 after applying recipes?

[gounthar]

java -jar plugin-modernizer-cli/target/jenkins-plugin-modernizer-999999-SNAPSHOT.jar --plugins open-stf --recipes AddPluginsBom,AddCodeOwner -n
Picked up JAVA_TOOL_OPTIONS: -XX:+UseContainerSupport -XX:ActiveProcessorCount=1
Starting Plugin Modernizer 
Picked up JAVA_TOOL_OPTIONS: -XX:+UseContainerSupport -XX:ActiveProcessorCount=1
REQUEST: https://updates.jenkins.io/current/update-center.actual.json GET 
RESPONSE: (GET https://updates.jenkins.io/current/update-center.actual.json) 200 HTTP_2 Local port:  59722 
Skipping forking plugin open-stf in dry-run mode 
Skipping sync plugin open-stf in dry-run mode 
Fetching plugin code locally open-stf... 
ERROR: GoAway debugData timeout 
ERROR: java.io.IOException: /10.0.5.2:59722: GOAWAY received
        at java.net.http/jdk.internal.net.http.Http2Connection.handleGoAway(Http2Connection.java:1009)
        at java.net.http/jdk.internal.net.http.Http2Connection.handleConnectionFrame(Http2Connection.java:874)
        at java.net.http/jdk.internal.net.http.Http2Connection.processFrame(Http2Connection.java:749)
        at java.net.http/jdk.internal.net.http.frame.FramesDecoder.decode(FramesDecoder.java:155)
        at java.net.http/jdk.internal.net.http.Http2Connection$FramesController.processReceivedData(Http2Connection.java:232)
        at java.net.http/jdk.internal.net.http.Http2Connection.asyncReceive(Http2Connection.java:675)
        at java.net.http/jdk.internal.net.http.Http2Connection$Http2TubeSubscriber.processQueue(Http2Connection.java:1311)
        at java.net.http/jdk.internal.net.http.common.SequentialScheduler$LockingRestartableTask.run(SequentialScheduler.java:205)
        at java.net.http/jdk.internal.net.http.common.SequentialScheduler$CompleteRestartableTask.run(SequentialScheduler.java:149)
        at java.net.http/jdk.internal.net.http.common.SequentialScheduler$SchedulableTask.run(SequentialScheduler.java:230)
        at java.net.http/jdk.internal.net.http.common.SequentialScheduler.runOrSchedule(SequentialScheduler.java:303)
        at java.net.http/jdk.internal.net.http.common.SequentialScheduler.runOrSchedule(SequentialScheduler.java:256)
        at java.net.http/jdk.internal.net.http.Http2Connection$Http2TubeSubscriber.runOrSchedule(Http2Connection.java:1329)
        at java.net.http/jdk.internal.net.http.Http2Connection$Http2TubeSubscriber.onNext(Http2Connection.java:1355)
        at java.net.http/jdk.internal.net.http.Http2Connection$Http2TubeSubscriber.onNext(Http2Connection.java:1289)
        at java.net.http/jdk.internal.net.http.common.SSLTube$DelegateWrapper.onNext(SSLTube.java:210)
        at java.net.http/jdk.internal.net.http.common.SSLTube$SSLSubscriberWrapper.onNext(SSLTube.java:492)
        at java.net.http/jdk.internal.net.http.common.SSLTube$SSLSubscriberWrapper.onNext(SSLTube.java:295)
        at java.net.http/jdk.internal.net.http.common.SubscriberWrapper$DownstreamPusher.run1(SubscriberWrapper.java:316)
        at java.net.http/jdk.internal.net.http.common.SubscriberWrapper$DownstreamPusher.run(SubscriberWrapper.java:259)
        at java.net.http/jdk.internal.net.http.common.SequentialScheduler$LockingRestartableTask.run(SequentialScheduler.java:205)
        at java.net.http/jdk.internal.net.http.common.SequentialScheduler$CompleteRestartableTask.run(SequentialScheduler.java:149)
        at java.net.http/jdk.internal.net.http.common.SequentialScheduler$SchedulableTask.run(SequentialScheduler.java:230)
        at java.net.http/jdk.internal.net.http.common.SequentialScheduler.runOrSchedule(SequentialScheduler.java:303)
        at java.net.http/jdk.internal.net.http.common.SequentialScheduler.runOrSchedule(SequentialScheduler.java:256)
        at java.net.http/jdk.internal.net.http.common.SubscriberWrapper.outgoing(SubscriberWrapper.java:232)
        at java.net.http/jdk.internal.net.http.common.SubscriberWrapper.outgoing(SubscriberWrapper.java:198)
        at java.net.http/jdk.internal.net.http.common.SSLFlowDelegate$Reader.processData(SSLFlowDelegate.java:444)
        at java.net.http/jdk.internal.net.http.common.SSLFlowDelegate$Reader$ReaderDownstreamPusher.run(SSLFlowDelegate.java:268)
        at java.net.http/jdk.internal.net.http.common.SequentialScheduler$LockingRestartableTask.run(SequentialScheduler.java:205)
        at java.net.http/jdk.internal.net.http.common.SequentialScheduler$CompleteRestartableTask.run(SequentialScheduler.java:149)
        at java.net.http/jdk.internal.net.http.common.SequentialScheduler$SchedulableTask.run(SequentialScheduler.java:230)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base/java.lang.Thread.run(Thread.java:840)
 
Metadata is not yet computed for plugin open-stf. Using minimum JDK available 
Compiling plugin open-stf with JDK 8 ... Please be patient 
^Cgitpod /workspace/plugin-modernizer-tool (main) $ java -jar plugin-modernizer-cli/target/jenkins-plugin-modernizer-999999-SNAPSHOT.jar --plugins git-client --recipes AddPluginsBom,AddCodeOwner -n
Picked up JAVA_TOOL_OPTIONS: -XX:+UseContainerSupport -XX:ActiveProcessorCount=1
Starting Plugin Modernizer 
Picked up JAVA_TOOL_OPTIONS: -XX:+UseContainerSupport -XX:ActiveProcessorCount=1
Skipping forking plugin git-client in dry-run mode 
Skipping sync plugin git-client in dry-run mode 
Fetching plugin code locally git-client... 
Metadata is not yet computed for plugin git-client. Using minimum JDK available 
^Cgitpod /workspace/plugin-modernizer-tool (main) $ java -jar plugin-modernizer-cli/target/jenkins-plugin-modernizer-999999-SNAPSHOT.jar --plugins git-client --recipes AddPluginsBom,AddCodeOwner 
Picked up JAVA_TOOL_OPTIONS: -XX:+UseContainerSupport -XX:ActiveProcessorCount=1
Starting Plugin Modernizer 
Picked up JAVA_TOOL_OPTIONS: -XX:+UseContainerSupport -XX:ActiveProcessorCount=1
Forking plugin git-client locally from repo git-client-plugin... 
Forking the repository to personal account gounthar... 
Syncing the forked repository gounthar/git-client-plugin 
Fetching plugin code locally git-client... 
Metadata is not yet computed for plugin git-client. Using minimum JDK available 
Build failed 
Compiling plugin git-client with JDK 8 ... Please be patient 
Build failed 
Plugin git-client failed to compile with JDK 8. Trying next one 
Compiling plugin git-client with JDK 11 ... Please be patient 
Done 
Plugin git-client compiled successfully with JDK 11 
Collecting metadata for plugin git-client... Please be patient 
Done 
Running recipes AddPluginsBom,AddCodeOwner for plugin git-client... Please be patient 
Done 
Verifying plugin git-client with JDK 21... Please be patient 

Why do we verify the plugin with JDK21 after applying recipes that don't have anything to do with JDK21?

Thanks.