Upgrade GitHub Actions for page artifact upload and deployment

Author: ldgrp

.github/workflows/pages.yml

@@ -53,7 +53,7 @@ jobs:
     - name: Generate site
       run: cabal exec site build
     - name: Upload artifact
-      uses: actions/upload-pages-artifact@v1
+      uses: actions/upload-pages-artifact@v3
 
   # Deployment job
   deploy:
@@ -65,4 +65,4 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v1
+        uses: actions/deploy-pages@v4