update to v4.2.12

CHANGELOG.md

Gemfile.lock

app/javascript/mastodon/actions/settings.js

...script/mastodon/components/admin/ReportReasonSelector.jsx

app/javascript/mastodon/components/dropdown_menu.jsx

...avascript/mastodon/features/compose/components/search.jsx

...ipt/mastodon/features/ui/components/focal_point_modal.jsx

app/javascript/mastodon/locales/en.json

app/lib/activitypub/activity/create.rb

app/lib/activitypub/adapter.rb

app/lib/video_metadata_extractor.rb

app/lib/webfinger.rb

app/models/account.rb

app/models/concerns/ldap_authenticable.rb

app/models/report.rb

app/models/tag.rb

...services/activitypub/fetch_featured_collection_service.rb

app/services/activitypub/fetch_remote_actor_service.rb

app/services/activitypub/process_status_update_service.rb

app/services/backup_service.rb