fix: return the newly created package dict, not the data dict from ch…

…ained create action

Not sure if this would have had any real impact up to now nor whether we should patch it in 2.9 as well, but in 2.10 not returning the right dict here causes an error in the new signals stuff.

ckanext/attribution/logic/actions/create.py

@@ -87,4 +87,4 @@ def package_create(next_func, context, data_dict):
     parse_contributors(context, created_pkg)
 
     data_dict['author'] = get_author_string(package_id=created_pkg['id'])
-    return data_dict
+    return created_pkg