build(deps): bump gradle/actions from 5 to 6

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

Author: dependabot[bot]

.github/workflows/android.yml

@@ -54,7 +54,7 @@ jobs:
           java-version-file: ".github/.java-version"
           distribution: "temurin"
       # Also performs Gradle wrapper validation
-      - uses: "gradle/actions/setup-gradle@v5"
+      - uses: "gradle/actions/setup-gradle@v6"
 
       # HelloXR OpenGLES version
       - name: Build HelloXR OpenGLES for Android