Docs: update code snippet to deploy to github

src/content/docs/en/guides/deploy/github.mdx

@@ -54,18 +54,24 @@ Astro maintains the official `withastro/action` to deploy your project with very
       # Allows you to run this workflow manually from the Actions tab on GitHub.
       workflow_dispatch:
 
-    # Allow this job to clone the repo and create a page deployment
+    # Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages.
     permissions:
       contents: read
       pages: write
       id-token: write
+
+    # Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
+    # However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
+    concurrency:
+      group: 'pages'
+      cancel-in-progress: false
 
     jobs:
       build:
         runs-on: ubuntu-latest
         steps:
           - name: Checkout your repository using git
-            uses: actions/checkout@v3
+            uses: actions/checkout@v4
           - name: Install, build, and upload your site
             uses: withastro/action@v1
             # with:
@@ -82,7 +88,7 @@ Astro maintains the official `withastro/action` to deploy your project with very
         steps:
           - name: Deploy to GitHub Pages
             id: deployment
-            uses: actions/deploy-pages@v1
+            uses: actions/deploy-pages@v2
     ```
 
     :::note