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

Author: renovate[bot]

.github/workflows/main.yml

@@ -39,7 +39,7 @@ jobs:
           java-version: ${{ matrix.java-version }}
 
       - name: Setup Gradle
-        uses: gradle/actions/setup-gradle@0723195856401067f7a2779048b490ace7a47d7c # v5
+        uses: gradle/actions/setup-gradle@39e147cb9de83bb9910b8ef8bd7fff0ee20fcd6f # v6
         with:
           cache-read-only: ${{ github.event_name != 'push' || github.ref != 'refs/heads/main' }}
 

.github/workflows/release.yml

@@ -94,7 +94,7 @@ jobs:
           git tag -f ${GIT_TAG}
 
       - name: Setup Gradle
-        uses: gradle/actions/setup-gradle@0723195856401067f7a2779048b490ace7a47d7c # v5
+        uses: gradle/actions/setup-gradle@39e147cb9de83bb9910b8ef8bd7fff0ee20fcd6f # v6
         with:
           cache-read-only: true