Fix: switch back to actions/checkout@v4 (runner nativo ha Node.js)

.gitea/workflows/nightly.yml

@@ -10,15 +10,7 @@ jobs:
     runs-on: linux-amd64
 
     steps:
-      - name: Checkout code
-        run: |
-          # No Node.js available in runner container — use git directly
-          cd "${GITHUB_WORKSPACE:-.}"
-          git init
-          git remote add origin http://gitea:3000/dguiducci/Skald-Circle.git
-          git fetch --depth 1 origin "${GITHUB_REF_NAME:-main}"
-          git checkout FETCH_HEAD
-          git submodule update --init --recursive 2>/dev/null || true
+      - uses: actions/checkout@v4
 
       - name: Build native (linux/amd64)
         run: ./build.sh