Update build.yml

.github/workflows/build.yml

@@ -4,14 +4,14 @@ jobs:
   gradle:
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest, windows-latest]
+        os: [ubuntu-latest]
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-java@v3
         with:
           distribution: temurin
-          java-version: 11
+          java-version: 8
 
       - name: Setup Gradle
         uses: gradle/gradle-build-action@v2