Update gradle.yml

Author: Yanndroid

.github/workflows/gradle.yml

@@ -32,7 +32,7 @@ jobs:
         uses: actions/setup-java@v2
         with:
           distribution: "zulu"
-          java-version: "8"
+          java-version: "11"
           cache: "gradle"
 
       - name: grant execute permission for gradlew