Updated changelog to include R7 ally fixes.

CHANGELOG.md

@@ -9,6 +9,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - [client] Added an empty state for the recent bots submenu in the app menu for Windows in PR [1945](https://github.com/microsoft/BotFramework-Emulator/pull/1945)
 - [client] Fixed a bug that was showing the custom user ID validation message when disabled in PR [1946](https://github.com/microsoft/BotFramework-Emulator/pull/1946)
 - [client] Improved error logging when opening a bot via URL in debug mode in PR [1949](https://github.com/microsoft/BotFramework-Emulator/pull/1949)
+- [client] Fixed various accessibility issues in PRs:
+  - [1970](https://github.com/microsoft/BotFramework-Emulator/pull/1970)
+  - [1982](https://github.com/microsoft/BotFramework-Emulator/pull/1982)
+  - [1983](https://github.com/microsoft/BotFramework-Emulator/pull/1983)
 
 ## v4.6.0 - 2019 - 10 - 31
 ## Added