chore: bump emqx_retainer version && update CHANGES-5.0.md

CHANGES-5.0.md

@@ -7,6 +7,7 @@
 * Avoid publishing will message when client fails to auhtenticate. [#8887](https://github.com/emqx/emqx/pull/8887)
 * Speed up dispatching of shared subscription messages in a cluster [#8893](https://github.com/emqx/emqx/pull/8893)
 * Speed up updating the configuration, When some nodes in the cluster are down. [#8857](https://github.com/emqx/emqx/pull/8857)
+* Fix that EMQX can't start when the retainer is disabled [#8911](https://github.com/emqx/emqx/pull/8911)
 
 ## Enhancements
 

apps/emqx_retainer/src/emqx_retainer.app.src

@@ -2,7 +2,7 @@
 {application, emqx_retainer, [
     {description, "EMQX Retainer"},
     % strict semver, bump manually!
-    {vsn, "5.0.4"},
+    {vsn, "5.0.5"},
     {modules, []},
     {registered, [emqx_retainer_sup]},
     {applications, [kernel, stdlib, emqx]},