Changed version of deploy-pages in an attempt to make it better compatible with the new version of upload-pages-artifact

Author: Philip-Schaer

.github/workflows/jekyll-gh-pages.yml

@@ -48,4 +48,4 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v2
+        uses: actions/deploy-pages@v4