Update gradle/actions digest to 3f5f9ad

Author: renovate[bot]

.github/workflows/integration-test.yml

@@ -280,7 +280,7 @@ jobs:
           java-version: 25
 
       - name: Set up Gradle
-        uses: gradle/actions/setup-gradle@9c971963bec38e04b3d30dcc455b5382be2fdbfb # v6
+        uses: gradle/actions/setup-gradle@3f5f9adaf7d9fecd50b5935e54106014257a94e6 # v6
 
       - name: Compile split-tests-java
         working-directory: split-tests-java