Update jam-post.yml

Author: Tom-Ski

.github/workflows/jam-post.yml

@@ -161,7 +161,7 @@ jobs:
 
       - 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
 
   deploy:
     environment: