upgrade to actions/upload-pages-artifact@v3 to fix broken workflow due to deprecation

Signed-off-by: Grace Grimwood <[email protected]>

Author: gracegrimwood

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

@@ -52,7 +52,7 @@ jobs:
           JEKYLL_ENV: production
       - name: Upload artifact
         # Automatically uploads an artifact from the './_site' directory by default
-        uses: actions/upload-pages-artifact@v2
+        uses: actions/upload-pages-artifact@v3
 
   # Deployment job
   deploy: