Fix joined_rooms/joined_room_ids usage

This change was introduced in #17203

But then #17207 was
reverted which brought back usage `joined_rooms` that needed to be
updated. Wasn't caught because `develop` wasn't up to date before merging

synapse/handlers/sync.py

@@ -1875,7 +1875,7 @@ async def _generate_sync_entry_for_device_list(
                 # or if the changed user is the syncing user (as we always
                 # want to include device list updates of their own devices).
                 if user_id == changed_user_id or any(
-                    rid in joined_rooms for rid in entries
+                    rid in joined_room_ids for rid in entries
                 ):
                     users_that_have_changed.add(changed_user_id)
         else: