Update jekyll.yml

Updates:

- actions/upload-pages-artifact v1 -> v3
- actions/deploy-pages v1 -> v4

Author: oksman

.github/workflows/jekyll.yml

@@ -48,7 +48,7 @@ jobs:
           JEKYLL_ENV: production
       - name: Upload artifact
         # Automatically uploads an artifact from the './_site' directory by default
-        uses: actions/upload-pages-artifact@v1
+        uses: actions/upload-pages-artifact@v3
 
   # Deployment job
   deploy:
@@ -60,4 +60,4 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v1
+        uses: actions/deploy-pages@v4