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

Conflicts:
- `.prettierignore`:
  Upstream added a line at the end of the file, while glitch-soc had its own
  extra lines.
  Took upstream's change.
- `CONTRIBUTING.md`:
  We have our custom CONTRIBUTING.md quoting upstream. Upstream made changes.
  Ported upstream changes.
- `app/controllers/application_controller.rb`:
  Upstream made code style changes in a method that is entirely replaced
  in glitch-soc.
  Ignored the change.
- `app/models/account.rb`:
  Code style changes textually close to glitch-soc-specific changes.
  Ported upstream changes.
- `lib/sanitize_ext/sanitize_config.rb`:
  Upstream code style changes.
  Ignored them.

spec/validators/status_length_validator_spec.rb

@@ -7,13 +7,13 @@ describe StatusLengthValidator do
     it 'does not add errors onto remote statuses' do
       status = double(local?: false)
       subject.validate(status)
-      expect(status).not_to receive(:errors)
+      expect(status).to_not receive(:errors)
     end
 
     it 'does not add errors onto local reblogs' do
       status = double(local?: false, reblog?: true)
       subject.validate(status)
-      expect(status).not_to receive(:errors)
+      expect(status).to_not receive(:errors)
     end
 
     it 'adds an error when content warning is over MAX_CHARS characters' do