feat(docs): add chinese news author application (#38891)

Add doc for author applications to Chinese /news. Also renamed docs in _sidebar.md so only there's only the Chinese version of the title.

docs/_sidebar.md

@@ -9,8 +9,9 @@
   - [Work on the docs theme](/how-to-work-on-the-docs-theme.md)
   - [Catch outgoing emails locally](/how-to-catch-outgoing-emails-locally.md)
 - **<i class="fad fa-language"></i> Chinese Community Contribution Guides** (中文社区贡献指南)
-  - [Translate news articles (文章翻译计划)](/chinese-guides/news-translations.md)
-  - [Translate videos (视频翻译计划)](/chinese-guides/video-translations.md)
+  - [成为专栏作者](/chinese-guides/news-author-application.md)
+  - [文章翻译计划](/chinese-guides/news-translations.md)
+  - [视频翻译计划](/chinese-guides/video-translations.md)
 - **<i class="fad fa-plane-alt"></i> Flight Manuals** (for Staff & Mods)
   - [Our DevOps Guide](/devops.md)
   - [Using Reply Templates](/flight-manuals/using-reply-templates.md)