docs: update CHANGELOG

Author: cybex-dev

CHANGELOG.md

@@ -1,6 +1,7 @@
 ## 0.2.2
 
 * Fix: [Android] Fix cancelling call when app is in background throws [BackgroundServiceStartNotAllowedException](https://developer.android.com/reference/android/app/BackgroundServiceStartNotAllowedException). [Issue #204](https://github.com/cybex-dev/twilio_voice/issues/204)
+* Fix: [Web] Fixed microphone permission (using `getUserMedia`) for Firefox & Safari. [Issue #260](https://github.com/cybex-dev/twilio_voice/issues/260). Credit to [@AndreiMisiukevich](https://github.com/AndreiMisiukevich)
 
 ## 0.2.1