chore: add changelog entry

changes/ce/feat-12201.en.md

@@ -0,0 +1,10 @@
+Support hot update of TCP/SSL/WS/WSS MQTT listeners configuration, which allows changing most of the configuration parameters without restarting the listener and disconnecting the clients.
+
+In case of TCP/SSL listeners, changes to the following parameters still require full listener restart:
+ * `bind`
+ * `tcp_options.backlog`
+
+In case of WS/WSS listeners, any parameter can be freely changed without losing the connected clients. However, changing transport related parameters will cause listening socket to be re-opened, namely:
+ * `bind`
+ * `tcp_options.*`
+ * `ssl_options.*`