In Google Play and App Store, it is desirable to use en-GB (English UK) as the
default locale for legal reasons. We heard from F-Droid folks that en-GB is not
as well supported as en-US
https://github.com/status-im/status-mobile/issues/21665.
In this PR we go back to en-US as the default locale in fastlane and update the
text for English (UK) standards. Google Play and App Store shouldn’t be affected
and will use en-GB as the default locale.
Fixes https://github.com/status-im/status-mobile/issues/21665