Merge branch 'main' into glitch-soc/merge-upstream

Conflicts:
- `.github/dependabot.yml`:
  Upstream made changes while we have dropped this file.
  Keep the file deleted.
- `.prettierignore`:
  Upstream made changes at the end of the file, where we
  had our extra lines.
  Just moved our extra lines back at the end.
- `app/serializers/initial_state_serializer.rb`:
  Upstream code style changes.
  Applied them.
- `app/services/backup_service.rb`:
  Upstream code style changes.
  Applied them.

app/services/backup_service.rb

@@ -23,7 +23,7 @@ class BackupService < BaseService
     account.statuses.with_includes.reorder(nil).find_in_batches do |statuses|
       statuses.each do |status|
         item = serialize_payload(ActivityPub::ActivityPresenter.from_status(status), ActivityPub::ActivitySerializer, signer: @account, allow_local_only: true)
-        item.delete(:'@context')
+        item.delete(:@context)
 
         unless item[:type] == 'Announce' || item[:object][:attachment].blank?
           item[:object][:attachment].each do |attachment|