swh.loader.pypi.model: Fix the wrong call to fetch_release

swh/loader/pypi/model.py

@@ -112,7 +112,8 @@ class PyPiProject:
                 'date': release['upload_time'],
             }
             # fetch and write locally archives
-            _release = self.client.fetch_release(version, _flattenned_release)
+            _release = self.client.fetch_release(
+                self.project, _flattenned_release)
 
             yield version, {
                 'info': release_info,