[core] Update changelog

CHANGELOG.md

@@ -26,6 +26,12 @@
 
 - [core] Add support for using `within expression` with layout propery. ([#16194](https://github.com/mapbox/mapbox-gl-native/pull/16194))
 
+### 🐞 Bug fixes
+
+- [core] Don't provide multiple responses with the same data for 304 replies ([#16200](https://github.com/mapbox/mapbox-gl-native/pull/16200))
+
+  In cases when cached resource is useable, yet don't have an expiration timestamp, we provided data to the requester from the cache and then, immediately when we get 304 response, from the network. Therefore, we delivered same data twice to the requestor.
+
 ### 🏁 Performance improvements
 
  - [core] Loading images to style optimization ([#16187](https://github.com/mapbox/mapbox-gl-native/pull/16187))