chore: bump gradle/actions from 4 to 6 (#830)

* chore: bump gradle/actions from 4 to 6

Bumps [gradle/actions](https://github.com/gradle/actions) from 4 to 6.
- [Release notes](https://github.com/gradle/actions/releases)
- [Commits](https://github.com/gradle/actions/compare/v4...v6)

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

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

* ci: use MIT basic cache provider in CodeQL setup-gradle

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: M57 <hy4ri@users.noreply.github.com>

.github/workflows/codeql.yml

@@ -36,9 +36,10 @@ jobs:
         java-version: '21'
 
     - name: Setup Gradle
-      uses: gradle/actions/setup-gradle@v4
+      uses: gradle/actions/setup-gradle@v6
       with:
         validate-wrappers: true
+        cache-provider: basic # keep 100% MIT — avoid proprietary gradle-actions-caching
 
     - name: Grant Execute Permission for Gradlew
       run: chmod +x gradlew