fix: copilot header font (#5261)

* Fix: copilot header font to be defaulted to primary font
* Update snapshots
* Changelog

Author: OEvgeny

CHANGELOG.md

@@ -33,10 +33,11 @@ Notes: web developers are advised to use [`~` (tilde range)](https://github.com/
 -  (Experimental) Added pre-chat message with starter prompts, in PR [#5255](https://github.com/microsoft/BotFramework-WebChat/issues/5255), by [@compulim](https://github.com/compulim)
 -  (Experimental) Added `isPrimary` props to Fluent UI send box. When set, will wire up with `useSendBoxValue` and works with starter prompts in pre-chat message, in PR [#5257](https://github.com/microsoft/BotFramework-WebChat/issues/5257), by [@compulim](https://github.com/compulim)
 -  (Experimental) Expand Fluent theme support to activities and transcript, in PR [#5258](https://github.com/microsoft/BotFramework-WebChat/pull/5258), by [@OEvgeny](https://github.com/OEvgeny)
--  Added new Fluent UI theme variant "copilot" with updated styling and components, in PR [#5258](https://github.com/microsoft/BotFramework-WebChat/pull/5258), by [@OEvgeny](https://github.com/OEvgeny)
--  Introduced `ActivityDecorator` component for enhanced message styling and layout, in PR [#5258](https://github.com/microsoft/BotFramework-WebChat/pull/5258), by [@OEvgeny](https://github.com/OEvgeny)
--  Added `CopilotMessageHeader` component for displaying bot information in the "copilot" variant, in PR [#5258](https://github.com/microsoft/BotFramework-WebChat/pull/5258), by [@OEvgeny](https://github.com/OEvgeny)
--  Updated Fluent theme styling to improve accessibility and visual consistency, in PR [#5258](https://github.com/microsoft/BotFramework-WebChat/pull/5258), by [@OEvgeny](https://github.com/OEvgeny)
+   -  Added new Fluent UI theme variant "copilot" with updated styling and components, in PR [#5258](https://github.com/microsoft/BotFramework-WebChat/pull/5258), by [@OEvgeny](https://github.com/OEvgeny)
+   -  Introduced `ActivityDecorator` component for enhanced message styling and layout, in PR [#5258](https://github.com/microsoft/BotFramework-WebChat/pull/5258), by [@OEvgeny](https://github.com/OEvgeny)
+   -  Added `CopilotMessageHeader` component for displaying bot information in the "copilot" variant, in PR [#5258](https://github.com/microsoft/BotFramework-WebChat/pull/5258), by [@OEvgeny](https://github.com/OEvgeny)
+   -  Updated Fluent theme styling to improve accessibility and visual consistency, in PR [#5258](https://github.com/microsoft/BotFramework-WebChat/pull/5258), by [@OEvgeny](https://github.com/OEvgeny)
+   -  Fixed header font in copilot variant, in PR [#5261](https://github.com/microsoft/BotFramework-WebChat/pull/5261), by [@OEvgeny](https://github.com/OEvgeny)
 
 ### Changed
 

__tests__/__image_snapshots__/html/side-by-side-wide-js-fluent-theme-applied-side-by-side-left-transcript-right-transcript-1-snap.png

@@ -1,6 +1,7 @@
 
 :global(.webchat-fluent) .activity-decorator {
   display: contents;
+  font-family: var(--webchat__font--primary);
 
   --webchat__bubble--inline-padding: var(--webchat-spacingHorizontalL);
   --webchat__bubble--block-padding: var(--webchat-spacingVerticalM);