Updated README.md

Removing mentions and video call from the known issues as they should have been fixed as part of version 0.1.8 (#10 )

README.md

@@ -42,19 +42,9 @@ yarn start --partition persist:teams-linux
 
 ## Known issues
 
-### Video calls
-Currently Microsoft only supports video calls when using a browser with the edge userAgent.
-
-Use `teams --userAgent edge` to be able to use video calls.
-
-### Mentions not working with userAgent edge
-@mentions dissapear after a few seconds of typing it when using the userAgent as edge.
-
-There is currently no work around it. This is the reason why the detault userAgent is, at this moment in time, chrome.
-
 ### No history
 Switching the userAgent with the persistence turn on sometimes have the side effect of "loosing" the channels history. Removing the data under `~/.config/teams-for-linux` should fix the issue.
 
 ## License
 
-[GPLv3](LICENSE.md)
+[GPLv3](LICENSE.md)