Fix new flake8 errors (#7489)

This is a cherry-pick of 1a1da60ad2c9172fe487cd38a164b39df60f4cb5 (#7470)
to the release-v1.13.0 branch.

1 files changed, 1 insertions, 1 deletions

diff --git a/synapse/config/server.py b/synapse/config/server.py

index 6d88231843..ed28da3deb 100644
--- a/synapse/config/server.py
+++ b/synapse/config/server.py
@@ -522,7 +522,7 @@ class ServerConfig(Config):
         )
 
     def has_tls_listener(self) -> bool:
-        return any(l["tls"] for l in self.listeners)
+        return any(listener["tls"] for listener in self.listeners)
 
     def generate_config_section(
         self, server_name, data_dir_path, open_private_ports, listeners, **kwargs