Fix incorrect definition

group_vars/matrix_servers

@@ -1378,7 +1378,7 @@ matrix_nginx_proxy_proxy_matrix_federation_api_addr_sans_container: "127.0.0.1:1
 
 matrix_nginx_proxy_proxy_synapse_enabled: "{{ matrix_synapse_enabled }}"
 matrix_nginx_proxy_proxy_synapse_client_api_addr_with_container: "matrix-synapse:{{ matrix_synapse_container_client_api_port }}"
-matrix_nginx_proxy_proxy_synapse_client_api_addr_sans_container: "127.0.0.1:{{ matrix_dendrite_container_client_api_port }}"
+matrix_nginx_proxy_proxy_synapse_client_api_addr_sans_container: "127.0.0.1:{{ matrix_synapse_container_client_api_port }}"
 matrix_nginx_proxy_proxy_synapse_federation_api_addr_with_container: "matrix-synapse:{{matrix_synapse_container_federation_api_plain_port|string}}"
 matrix_nginx_proxy_proxy_synapse_federation_api_addr_sans_container: "localhost:{{matrix_synapse_container_federation_api_plain_port|string}}"