Do not try to use TURNS when TLS disabled for Coturn

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/1145

group_vars/matrix_servers

@@ -1682,7 +1682,7 @@ matrix_synapse_turn_uris: |
     [
       'turns:' + matrix_server_fqn_matrix + '?transport=udp',
       'turns:' + matrix_server_fqn_matrix + '?transport=tcp',
-    ] if matrix_coturn_enabled and matrix_ssl_retrieval_method != 'lets-encrypt' else []
+    ] if matrix_coturn_enabled and matrix_coturn_tls_enabled and matrix_ssl_retrieval_method != 'lets-encrypt' else []
     +
     [
       'turn:' + matrix_server_fqn_matrix + '?transport=udp',