Merge pull request #98 from SamBarker/fix-deply

upgrade to deploy-pages v4

Author: SamBarker

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

@@ -64,4 +64,4 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v2
+        uses: actions/deploy-pages@v4