Fix arguments on `after_move_page` hook

website/contrib/singleton_page/wagtail_hooks.py

@@ -1,5 +1,6 @@
 from django.core.cache import cache
 from wagtail import hooks
+from wagtail.models import Page
 
 from website.common.utils import get_page_models
 
@@ -7,7 +8,7 @@ from .utils import SingletonPageCache
 
 
 @hooks.register("after_move_page")
-def clear_singleton_url_cache(**kwargs: dict) -> None:
+def clear_singleton_url_cache(page_to_move: Page) -> None:
     """
     Clear all page caches, in case a parent has moved
     """