Firefox user-overrides.js update

I updated my user-overrides.js to coincide with the release of Firefox 94. The repo is here and the file is here. Unfortunately the latest commit information (changes to the file) on the repo is useless because at first i mistakenly pasted the wrong file and then committed the changes :)

The changes were very minor in that i only added 2 prefs which were removed from the arkenfox user.js:

extensions.systemAddon.update.enabled
extensions.systemAddon.update.url