Switch to setup-gradle action v4 for docs

Author: aNNiMON

.github/workflows/docs.yml

@@ -30,10 +30,10 @@ jobs:
         with:
           java-version: ${{ matrix.java }}
           distribution: 'temurin'
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v4
       - name: Build docs
-        uses: gradle/actions/setup-gradle@v3
-        with:
-          arguments: buildDocs
+        run: ./gradlew buildDocs
 
       - name: Clear docs
         uses: appleboy/ssh-action@v1.0.3