chore: update some links to fred (#40840)

Author: bsmth

files/en-us/mdn/community/getting_started/index.md

@@ -60,7 +60,7 @@ Here's a list of ways you can contribute to MDN Web Docs:
 - [Review pull requests](/en-US/docs/MDN/Community/Pull_requests)
 - [Help beginners in our community](/en-US/docs/MDN/Community)
 - [Help translate MDN Web Docs](/en-US/docs/MDN/Community/Translated_content)
-- [Help fix known backend issues](https://github.com/mdn/rari/issues) and [known frontend issues](https://github.com/mdn/yari/issues)
+- [Help fix known backend issues](https://github.com/mdn/rari/issues) and [known frontend issues](https://github.com/mdn/fred/issues)
 - [Help us keep browser compatibility data up to date](https://github.com/mdn/browser-compat-data)
 
 ## Contributions

files/en-us/mdn/community/issues/index.md

@@ -120,7 +120,7 @@ Using the [guidelines on working on an issue](#guidelines_for_working_on_an_issu
 
 - The MDN Web Docs **content** (in English) in the [mdn/content](https://github.com/mdn/content) repository
 - The MDN Web Docs **translated content** in the [mdn/translated-content](https://github.com/mdn/translated-content) repository
-- The MDN Web Docs **frontend** in the [mdn/yari](https://github.com/mdn/yari) repository
+- The MDN Web Docs **frontend** in the [mdn/fred](https://github.com/mdn/fred) repository
 
 Each repository includes useful information to guide you on how to contribute.
 For more information, see [our main GitHub repositories](/en-US/docs/MDN/Community/Our_repositories).

files/en-us/mdn/community/our_repositories/index.md

@@ -16,7 +16,7 @@ This document describes the repositories (repos) you may need when contributing
   - : This is where all the English content of the site is maintained, and where you'll make all changes to page content, prose, and in-page code examples.
 - [rari](https://github.com/mdn/rari)
   - : The **backend** of the MDN Web Docs platform, where you'll go if you want to make changes to page structures, templating, and rendering machinery.
-- [yari](https://github.com/mdn/yari)
+- [fred](https://github.com/mdn/fred)
   - : The **frontend** of MDN Web Docs, where you'll find styles, design, and layout functionality.
 - [browser-compat-data](https://github.com/mdn/browser-compat-data)
   - : Data used to generate the browser compatibility tables found on our reference pages.