Workers listen on ipv6

roles/matrix-synapse/templates/synapse/worker.yaml.j2

@@ -25,7 +25,7 @@ worker_replication_http_port: {{ matrix_synapse_replication_http_port }}
 worker_listeners:
 {% if http_resources|length > 0 %}
   - type: http
-    bind_addresses: ['::']
+    bind_addresses: ['0.0.0.0']
     port: {{ matrix_synapse_worker_details.port }}
     resources:
       - names: {{ http_resources|to_json }}