fix: Github Action workflow

Author: FrogDevelopper

.github/workflows/build.yml

@@ -13,18 +13,19 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v1
-      - name: Prepare repository
-        run: git checkout "${GITHUB_REF:11}"
-      - name: Setup Java environment based on AdoptOpenJDK
-        uses: joschi/[email protected]
+      - uses: actions/checkout@v2
+
+      - name: Setup Java 14
+        uses: joschi/setup-jdk@v2
         with:
-          java-version: openjdk11
-          openjdk_impl: openj9
+          java-version: '14'
+
       - name: Compile
         run: ./gradlew classes
+
       - name: Test
         run: ./gradlew test
+
       - name: Analyse
         if: github.ref == 'refs/heads/master'
         run: ./gradlew sonarqube -Dsonar.login=${{ secrets.SONAR_LOGIN }} -Djgitver.branch=${GITHUB_REF:11}