Bump checker-qual in /annotation-file-utilities

Bumps [checker-qual](https://github.com/eisop/checker-framework) from 3.26.0-eisop1 to 3.28.0-eisop1.
- [Release notes](https://github.com/eisop/checker-framework/releases)
- [Changelog](https://github.com/eisop/checker-framework/blob/master/docs/CHANGELOG.md)
- [Commits](eisop/checker-framework@checker-framework-3.26.0-eisop1...checker-framework-3.28.0-eisop1)

---
updated-dependencies:
- dependency-name: io.github.eisop:checker-qual
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

annotation-file-utilities/build.gradle

@@ -57,7 +57,7 @@ dependencies {
     implementation 'org.plumelib:plume-util:1.6.0'
     implementation 'org.plumelib:reflection-util:1.0.5'
     // Annotations in checker-qual.jar are used, but no checkers are (currently) run on the code.
-    compileOnly 'io.github.eisop:checker-qual:3.26.0-eisop1'
+    compileOnly 'io.github.eisop:checker-qual:3.28.0-eisop1'
     ext.errorproneVersion = '2.16'
     // TODO: it's a bug that annotatedlib:guava requires the error_prone_annotations dependency.
     implementation "com.google.errorprone:error_prone_annotations:${errorproneVersion}"
@@ -68,7 +68,7 @@ dependencies {
     implementation 'org.ow2.asm:asm:9.4'
 
     testImplementation group: 'junit', name: 'junit', version: '4.13.2'
-    testImplementation 'io.github.eisop:checker-qual:3.25.0-eisop1'
+    testImplementation 'io.github.eisop:checker-qual:3.28.0-eisop1'
 
     errorprone("com.google.errorprone:error_prone_core:${errorproneVersion}")
 }