chore(ci): use official checkout action

.gitea/workflows/snapshot_admin_deploy.yml

@@ -16,16 +16,7 @@ jobs:
     timeout-minutes: 15
     steps:
       - name: Checkout Code
-        run: |
+        uses: actions/checkout@v3
-          echo "[deploy] checkout main for snapshot admin runtime"
-          if [ -d .git ]; then
-            git remote set-url origin http://x-access-token:${{ secrets.GITHUB_TOKEN }}@178.104.200.7/kjh2064/QuantEngineByItz.git
-          else
-            git init
-            git remote add origin http://x-access-token:${{ secrets.GITHUB_TOKEN }}@178.104.200.7/kjh2064/QuantEngineByItz.git
-          fi
-          git fetch origin main --depth=1
-          git reset --hard FETCH_HEAD
 
       - name: Setup .NET SDK
         uses: actions/setup-dotnet@v3