ci: try again to avoid to use wrapper

.github/workflows/ci.yaml

@@ -16,13 +16,10 @@ jobs:
         with:
           java-version: ${{ matrix.java }}
           distribution: 'microsoft'
-      - name: make gradle wrapper executable
-        if: ${{ runner.os != 'Windows' }}
-        run: chmod +x ./gradlew
-      - name: setup proxy
-        run: echo "systemProp.http.proxyHost=192.168.5.6\\nsystemProp.http.proxyPort=7890\\nsystemProp.https.proxyHost=192.168.5.6\\nsystemProp.https.proxyPort=7890" >> gradle.properties
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v4
       - name: build
-        run: _JAVA_OPTIONS="-Dhttp.proxyHost=192.168.5.6 -Dhttp.proxyPort=7890 -Dhttps.proxyHost=192.168.5.6 -Dhttps.proxyPort=7890" ./gradlew clean bootJar --no-daemon
+        run: gradle clean bootJar --no-daemon
       - name: capture build artifacts
         uses: actions/upload-artifact@v3
         with: