Fixes #2439 - Update CI to use Xcode 13
Fixes #2439 - Update CI to use Xcode 13

* update-release-workflow-xcode13

* Update bitrise.yml

Co-authored-by: Stefan Arentz <eb0877843acc39f8ef6f7269937dee931c372d23@arentz.ca>
mozilla-mobile/focus-ios,mozilla-mobile/focus-ios,mozilla-mobile/focus-ios,mozilla-mobile/focus-ios,mozilla-mobile/focus-ios,mozilla-mobile/focus-ios