Bump actions/setup-java from 5 to 6

Bumps [actions/setup-java](https://github.com/actions/setup-java) from 5 to 6.
- [Release notes](https://github.com/actions/setup-java/releases)
- [Commits](actions/setup-java@v5...v6)

---
updated-dependencies:
- dependency-name: actions/setup-java
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/maven.yml

@@ -23,7 +23,7 @@ jobs:
     name: Java ${{ matrix.Java }}
     steps:
       - uses: actions/checkout@v7
-      - uses: actions/setup-java@v5
+      - uses: actions/setup-java@v6
         with:
           distribution: 'zulu'
           java-version: ${{ matrix.Java }}