docs: update v5.0.10-en.md

changes/v5.0.10-en.md

@@ -10,4 +10,5 @@
 
 - Fix error log message when `mechanism` is missing in authentication config [#8924](https://github.com/emqx/emqx/pull/8924).
 
-- Fixed the response status code for the `/status` endpoint. Before the fix, it always returned 200 even if the EMQX application was not running. Now it returns 503 in that case.
+- Fixed the HTTP response status code for the `/status` endpoint [#9211](https://github.com/emqx/emqx/pull/9211).
+  Before the fix, it always returned `200` even if the EMQX application was not running. Now it returns `503` in that case.