chore(deps): update actions/upload-pages-artifact action to v4 (#214)

Co-authored-by: botty-mcbottington[bot] <168950816+botty-mcbottington[bot]@users.noreply.github.com>

Author: botty-mcbottington[bot]

.github/workflows/pages.yaml

@@ -35,7 +35,7 @@ jobs:
           cp pkg/config/config.*.json _site/schemas/
 
       - name: Upload artifact
-        uses: actions/upload-pages-artifact@v3
+        uses: actions/upload-pages-artifact@v4
 
   deploy:
     name: deploy