ci: fix checkout - replace actions/checkout@v4 with raw git (no node in host runner)

.gitea/workflows/deploy.yml

@@ -10,7 +10,12 @@ jobs:
     runs-on: self-hosted
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        run: |
+          if [ -d .git ]; then
+            git fetch origin master && git reset --hard origin/master && git clean -fd
+          else
+            git clone ${{ gitea.server_url }}/${{ gitea.repository }} . && git checkout ${{ gitea.sha }}
+          fi
 
       - name: Install frontend dependencies
         run: cd web && npm ci