Require Java 11

Require Jenkins 2.361.4 or newer.

https://www.jenkins.io/doc/developer/plugin-development/choosing-jenkins-baseline/
offers Jenkins 2.361.4 as one of the recommended versions.

Java 11 or newer is required for Jenkins 2.361.4 and for the most recent
releases of the parent pom.

Jenkinsfile

@@ -6,13 +6,13 @@ buildPlugin(
   useContainerAgent: true,
   // Show failures on all configurations
   failFast: false,
-  // Opt-in to the Artifact Caching Proxy, to be removed when it will be in opt-out.
+  // Opt-in to the Artifact Caching Proxy, to be removed when it will be opt-out.
   // See https://github.com/jenkins-infra/helpdesk/issues/2752 for more details and updates.
   artifactCachingProxyEnabled: true,
-  // Test Java 8 with default Jenkins version, Java 11 with a recent LTS, Java 17 even more recent
+  // Test Java 11 with a recent LTS, Java 17 even more recent
   configurations: [
-    [platform: 'linux',   jdk: '17', jenkins: '2.375'],
-    [platform: 'linux',   jdk: '11', jenkins: '2.361.4'],
-    [platform: 'windows', jdk:  '8']
+    [platform: 'linux',   jdk: '17', jenkins: '2.380'],
+    [platform: 'linux',   jdk: '11', jenkins: '2.375.1'],
+    [platform: 'windows', jdk: '11']
   ]
 )

pom.xml

@@ -61,7 +61,7 @@
         <dependencies>
             <dependency>
                 <groupId>io.jenkins.tools.bom</groupId>
-                <artifactId>bom-2.346.x</artifactId>
+                <artifactId>bom-2.361.x</artifactId>
                 <version>1723.vcb_9fee52c9fc</version>
                 <scope>import</scope>
                 <type>pom</type>
@@ -140,7 +140,7 @@
     <properties>
         <changelist>999999-SNAPSHOT</changelist>
         <gitHubRepo>jenkinsci/testng-plugin-plugin</gitHubRepo>
-        <jenkins.version>2.346.3</jenkins.version>
+        <jenkins.version>2.361.4</jenkins.version>
         <spotbugs.effort>Max</spotbugs.effort>
         <spotbugs.failOnError>true</spotbugs.failOnError>
         <!-- Not yet ready for Low threshold, too many warnings to resolve -->