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/controllers/api/v1/timelines/home_controller_spec.rb

@@ -36,7 +36,7 @@ describe Api::V1::Timelines::HomeController do
       it 'returns http unprocessable entity' do
         get :show
 
-        expect(response).to have_http_status(:unprocessable_entity)
+        expect(response).to have_http_status(422)
         expect(response.headers['Link']).to be_nil
       end
     end

spec/controllers/api/v1/timelines/list_controller_spec.rb

@@ -36,7 +36,7 @@ describe Api::V1::Timelines::ListController do
     describe 'GET #show' do
       it 'returns http not found' do
         get :show, params: { id: list.id }
-        expect(response).to have_http_status(:not_found)
+        expect(response).to have_http_status(404)
       end
     end
   end
@@ -48,7 +48,7 @@ describe Api::V1::Timelines::ListController do
       it 'returns http unprocessable entity' do
         get :show, params: { id: list.id }
 
-        expect(response).to have_http_status(:unprocessable_entity)
+        expect(response).to have_http_status(422)
         expect(response.headers['Link']).to be_nil
       end
     end