Correct URL of top communities in get_communities_iter

Author: dpk

dspace_rest_client/client.py

@@ -830,7 +830,7 @@ def get_communities_iter(do_paginate, self, sort=None, top=False):
         @return: Iterator of Community
         """
         if top:
-            url = f'{url}/core/communities/search/top'
+            url = f'{self.API_ENDPOINT}/core/communities/search/top'
         else:
             url = f'{self.API_ENDPOINT}/core/communities'