style: format the repository with prettier

These files were already out of step with the project's Prettier config
before this branch of work; running `pnpm format` finally swept them up.
No semantic changes.

Kept separate from the functional commits so the reformatting does not
bury them in diff noise.

docs/zh-hans/blogs/gitlab-ops.md

@@ -14,7 +14,7 @@ GitLab 在代码中通过 `SWITCHER_MINIMUM_TRANSLATION_LEVEL` 变量将翻译
 
 可以前往 `/path/to/gitlab/embedded/service/gitlab-rails/app/helpers/preferred_language_switcher_helper.rb` 中将代码修改如下：
 
-```diff title="/path/to/gitlab/embedded/service/gitlab-rails/app/helpers/preferred_language_switcher_helper.rb" 
+```diff title="/path/to/gitlab/embedded/service/gitlab-rails/app/helpers/preferred_language_switcher_helper.rb"
 - SWITCHER_MINIMUM_TRANSLATION_LEVEL = 90
 + SWITCHER_MINIMUM_TRANSLATION_LEVEL = 80
 ```