Update build.yml

Author: hoc081098

.github/workflows/build.yml

@@ -16,7 +16,7 @@ jobs:
       uses: actions/setup-java@v2
       with:
         distribution: 'zulu'
-        java-version: '8'
+        java-version: '11'
 
     - name: Make gradlew executable
       run: chmod +x ./gradlew