Update README for Mac key repeat (#2316)
Update README for Mac key repeat (#2316)

* Update README for Mac key repeat

I was having trouble getting my Mac to key repeat, I did some quick research and found https://github.com/Microsoft/vscode/issues/31919. The issue was that I had a global default that was true, which was overriding the application level `com.microsoft.VSCode` setting.

Chillee/Vim,VSCodeVim/Vim,Chillee/Vim,VSCodeVim/Vim