Add comment explaining why we use utility function

integrations/weaviate/src/haystack_integrations/document_stores/weaviate/document_store.py

@@ -173,6 +173,9 @@ def client(self):
             return self._client
 
         if self._url and self._url.startswith("http") and self._url.endswith(".weaviate.network"):
+            # We use this utility function instead of using WeaviateClient directly like in other cases
+            # otherwise we'd have to parse the URL to get some information about the connection.
+            # This utility function does all that for us.
             self._client = weaviate.connect_to_wcs(
                 self._url,
                 auth_credentials=self._auth_client_secret.resolve_value() if self._auth_client_secret else None,