Bump actions/setup-java

Bumps [actions/setup-java](https://github.com/actions/setup-java) from 5.7.0 to 6.0.0.
- [Release notes](https://github.com/actions/setup-java/releases)
- [Commits](actions/setup-java@v5.7.0...v6.0.0)

---
updated-dependencies:
- dependency-name: actions/setup-java
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/actions/spring-compute-milestone-to-release/action.yml

@@ -18,7 +18,7 @@ runs:
   using: composite
   steps:
 
-    - uses: actions/setup-java@v5.7.0
+    - uses: actions/setup-java@v6.0.0
       with:
         distribution: temurin
         java-version: 17