ci: bump actions/setup-java from 4 to 5.6.0

Bumps [actions/setup-java](https://github.com/actions/setup-java) from 4 to 5.6.0.
- [Release notes](https://github.com/actions/setup-java/releases)
- [Commits](actions/setup-java@v4...v5.6.0)

---
updated-dependencies:
- dependency-name: actions/setup-java
  dependency-version: 5.6.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -39,7 +39,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v7
-      - uses: actions/setup-java@v4
+      - uses: actions/setup-java@v5.6.0
         with:
           distribution: temurin
           java-version: '25'
@@ -113,7 +113,7 @@ jobs:
           --health-retries 10
     steps:
       - uses: actions/checkout@v7
-      - uses: actions/setup-java@v4
+      - uses: actions/setup-java@v5.6.0
         with:
           distribution: temurin
           java-version: '25'