fix(retainer): rename deliver_rate to delivery_rate

apps/emqx_retainer/src/emqx_retainer_schema.erl

@@ -75,10 +75,15 @@ fields("retainer") ->
                 stop_publish_clear_msg,
                 false
             )},
-        {deliver_rate,
+        {delivery_rate,
             ?HOCON(
                 emqx_limiter_schema:rate(),
-                #{required => false, desc => ?DESC(deliver_rate), example => <<"1000/s">>}
+                #{
+                    required => false,
+                    desc => ?DESC(delivery_rate),
+                    example => <<"1000/s">>,
+                    aliases => [deliver_rate]
+                }
             )},
         {backend, backend_config()}
     ];

rel/i18n/emqx_retainer_schema.hocon

@@ -46,6 +46,6 @@ whether to continue to publish the message.
 See:
 http://docs.oasis-open.org/mqtt/mqtt/v3.1.1/os/mqtt-v3.1.1-os.html#_Toc398718038"""
 
-deliver_rate.desc:
-"""The maximum rate of delivering retain messages"""
+delivery_rate.desc:
+"""The maximum rate of delivering retained messages"""
 }