adjust type module path

Author: joshuadavidthomas

docs/plugins.md

@@ -20,7 +20,7 @@ django-bird uses a plugin system based on [pluggy](https://pluggy.readthedocs.io
 ```
 ````
 
-````{py:function} register_asset_types(register_type: Callable[[AssetType], None]) -> None
+````{py:function} register_asset_types(register_type: collections.abc.Callable[[django_bird.staticfiles.AssetType], None]) -> None
 :canonical: django_bird.plugins.hookspecs.register_asset_types
 
 ```{autodoc2-docstring} django_bird.plugins.hookspecs.register_asset_types