update workflow

Author: chetabahana

.github/workflows/main.yml

@@ -30,7 +30,7 @@ jobs:
              github.ref_name != 'main' && 'windows-latest' || 'self-hosted') }}
     steps:
       - name: 📂 Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           submodules: recursive
           token: ${{ secrets.JEKYLL_GITHUB_TOKEN }}