Add PR number to changelog

Author: Eugene Olonov

CHANGELOG.md

@@ -63,7 +63,7 @@ Legends:
 - Fixed video and animation cards disappearing in production builds when the video URL is relative or invalid, in PR [#5889](https://github.com/microsoft/BotFramework-WebChat/pull/5889), by [@OEvgeny](https://github.com/OEvgeny)
 - Fixed timestamps always using the 12-hour clock, such as "4:41 PM" instead of "16:41" in German, in PR [#5920](https://github.com/microsoft/BotFramework-WebChat/pull/5920), by [@OEvgeny](https://github.com/OEvgeny)
 - Fixed carousel cards focused with <kbd>TAB</kbd> staying partially out of view, in PR [#5926](https://github.com/microsoft/BotFramework-WebChat/pull/5926), by [@OEvgeny](https://github.com/OEvgeny)
-- Fixed the "message" and "attachment" role descriptions being hard-coded in English, in PR [#XXXX](https://github.com/microsoft/BotFramework-WebChat/pull/XXXX), by [@OEvgeny](https://github.com/OEvgeny)
+- Fixed the "message" and "attachment" role descriptions being hard-coded in English, in PR [#5916](https://github.com/microsoft/BotFramework-WebChat/pull/5916), by [@OEvgeny](https://github.com/OEvgeny)
 
 ## [4.19.2] - 2026-10-08