Remove Java 11 from Github action build script

Author: tuancoltech

.github/workflows/gradle.yml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest]
-        java: [11, 17]
+        java: [17]
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v3