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.

lib/sanitize_ext/sanitize_config.rb

@@ -60,13 +60,11 @@ class Sanitize
 
       current_node = env[:node]
 
-      scheme = begin
-        if current_node['href'] =~ Sanitize::REGEX_PROTOCOL
-          Regexp.last_match(1).downcase
-        else
-          :relative
-        end
-      end
+      scheme = if current_node['href'] =~ Sanitize::REGEX_PROTOCOL
+                 Regexp.last_match(1).downcase
+               else
+                 :relative
+               end
 
       current_node.replace(Nokogiri::XML::Text.new(current_node.text, current_node.document)) unless LINK_PROTOCOLS.include?(scheme)
     end