Use correct name for contextMenus permission (#2613)
Use correct name for contextMenus permission (#2613)

According the the Browser Extension Working Draft (https://browserext.github.io/browserext/#contextMenus)
it should be called `contextMenus`.
teoli2003/browser-compat-data,mdn/browser-compat-data,mdn/browser-compat-data,chrisdavidmills/browser-compat-data,chrisdavidmills/browser-compat-data