Add link to reviewdog-action-prettier (#12648)

docs/related-projects.md

@@ -30,3 +30,4 @@ title: Related Projects
 - [prettier-chrome](https://github.com/u3u/prettier-chrome) is an extension that runs Prettier in the browser
 - [spotless](https://github.com/diffplug/spotless) lets you run prettier from [gradle](https://github.com/diffplug/spotless/tree/main/plugin-gradle#prettier) or [maven](https://github.com/diffplug/spotless/tree/main/plugin-maven#prettier).
 - [csharpier](https://github.com/belav/csharpier) is a port of Prettier for C#
+- [reviewdog-action-prettier](https://github.com/EPMatt/reviewdog-action-prettier) runs Prettier in GitHub Actions CI/CD workflows