chore(deps): update gradle/actions action to v6

Author: renovate[bot]

.github/workflows/build.yml

@@ -12,7 +12,7 @@ jobs:
           distribution: 'temurin'
           java-version: 21
       - name: Setup Gradle
-        uses: gradle/actions/setup-gradle@v5
+        uses: gradle/actions/setup-gradle@v6
       - name: Build with Gradle
         run: ./gradlew build
       - name: Test with Gradle