Update gradle/actions action to v6

Author: renovate[bot]

.github/workflows/check.yml

@@ -18,7 +18,7 @@ jobs:
             11
             21
       - name: Setup Gradle
-        uses: gradle/actions/setup-gradle@v5
+        uses: gradle/actions/setup-gradle@v6
       - name: Check
         run: ./gradlew check
       - name: Upload Reports

.github/workflows/publish.yml

@@ -18,7 +18,7 @@ jobs:
             11
             21
       - name: Setup Gradle
-        uses: gradle/actions/setup-gradle@v5
+        uses: gradle/actions/setup-gradle@v6
       - name: Check
         run: ./gradlew check
       - name: Publish Plugin