Remove usage of deprecated logger.warn method from codebase (#6271)

Replace every instance of `logger.warn` with `logger.warning` as the former is deprecated.

1 files changed, 1 insertions, 1 deletions

diff --git a/synapse/replication/http/membership.py b/synapse/replication/http/membership.py

index b5f5f13a62..cc1f249740 100644
--- a/synapse/replication/http/membership.py
+++ b/synapse/replication/http/membership.py
@@ -144,7 +144,7 @@ class ReplicationRemoteRejectInviteRestServlet(ReplicationEndpoint):
             # The 'except' clause is very broad, but we need to
             # capture everything from DNS failures upwards
             #
-            logger.warn("Failed to reject invite: %s", e)
+            logger.warning("Failed to reject invite: %s", e)
 
             await self.store.locally_reject_invite(user_id, room_id)
             ret = {}