chore(deps): update gradle/actions action to v6 (#6543)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.github/workflows/build_release_apk.yml

@@ -15,7 +15,7 @@ jobs:
         with:
           distribution: 'zulu'
           java-version: 21
-      - uses: gradle/actions/setup-gradle@v5
+      - uses: gradle/actions/setup-gradle@v6
         with:
           cache-encryption-key: Da25KUVSE5jbGds2zXmfXw==
       - name: Write sign info

.github/workflows/ci.yml

@@ -40,7 +40,7 @@ jobs:
         with:
           distribution: 'zulu'
           java-version: 21
-      - uses: gradle/actions/setup-gradle@v5
+      - uses: gradle/actions/setup-gradle@v6
         with:
           cache-encryption-key: Da25KUVSE5jbGds2zXmfXw==
       - name: Write sign info
@@ -71,7 +71,7 @@ jobs:
         with:
           distribution: 'zulu'
           java-version: 21
-      - uses: gradle/actions/setup-gradle@v5
+      - uses: gradle/actions/setup-gradle@v6
       - run: ./gradlew spotlessCheck
 
   send-notifications:

.github/workflows/release_update.yml

@@ -34,7 +34,7 @@ jobs:
         with:
           distribution: 'zulu'
           java-version: 21
-      - uses: gradle/actions/setup-gradle@v5
+      - uses: gradle/actions/setup-gradle@v6
       - name: Write sign info
         id: sign-release-apk
         if: github.repository_owner == 'LawnchairLauncher'