Checkout with correct SSH key

.gitea/workflows/smart-clinic-lint-backend.yml

@@ -11,12 +11,16 @@ jobs:
     runs-on: node20
     name: Checkstyle Java Linting
     steps:
-      - uses: actions/checkout@v3
-      - name: Set up JDK
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          ssh-key: ${{ secrets.SSH_DEVSOAP_PRIVATE_KEY }}
+      - name: Configure Java project
         uses: actions/setup-java@v4
         with:
           distribution: 'temurin'
           java-version: '21'
+          cache: 'gradle'
       - name: Download Checkstyle
         run: curl -L -o checkstyle.jar https://github.com/checkstyle/checkstyle/releases/download/checkstyle-10.12.1/checkstyle-10.12.1-all.jar
       - name: Run Checkstyle