Fixup contributing docs and links (github#31531)

Co-authored-by: Alex Nguyen <[email protected]>

.github/CONTRIBUTING.md

@@ -10,7 +10,7 @@ Use the table of contents icon <img src="/contributing/images/table-of-contents.
 
 ## New contributor guide
 
-To get an overview of the project, read the [README](README.md) file. Here are some resources to help you get started with open source contributions:
+To get an overview of the project, read the [README](../README.md) file. Here are some resources to help you get started with open source contributions:
 
 - [Finding ways to contribute to open source on GitHub](https://docs.github.com/en/get-started/exploring-projects-on-github/finding-ways-to-contribute-to-open-source-on-github)
 - [Set up Git](https://docs.github.com/en/get-started/getting-started-with-git/set-up-git)
@@ -20,7 +20,7 @@ To get an overview of the project, read the [README](README.md) file. Here are s
 
 ## Getting started
 
-To navigate our codebase with confidence, see [the introduction to working in the docs repository](/contributing/README.md) :confetti_ball:. For more information on how we write our markdown files, see "[Using Markdown and Liquid in GitHub Docs](https://docs.github.com/en/contributing/writing-for-github-docs/using-markdown-and-liquid-in-github-docs).
+To navigate our codebase with confidence, see [the introduction to working in the docs repository](/contributing/README.md) :confetti_ball:. For more information on how we write our markdown files, see "[Using Markdown and Liquid in GitHub Docs](https://docs.github.com/en/contributing/writing-for-github-docs/using-markdown-and-liquid-in-github-docs)."
 
 Check to see what [types of contributions](/contributing/types-of-contributions.md) we accept before making changes. Some of them don't even require writing a single line of code :sparkles:.
 
@@ -56,13 +56,13 @@ For more information about using a codespace for working on GitHub documentation
 - Using the command line:
   - [Fork the repo](https://docs.github.com/en/github/getting-started-with-github/fork-a-repo#fork-an-example-repository) so that you can make your changes without affecting the original project until you're ready to merge them.
 
-2. Install or update to **Node.js**, at the version specified in `.node-version`. For more information, see [the development guide](contributing/development.md).
+2. Install or update to **Node.js**, at the version specified in `.node-version`. For more information, see [the development guide](../contributing/development.md).
 
 3. Create a working branch and start with your changes!
 
 ### Commit your update
 
-Commit the changes once you are happy with them. Don't forget to use the "[Self review checklist](https://docs.github.com/en/contributing/collaborating-on-github-docs/self-review-checklist) to speed up the review process :zap:.
+Commit the changes once you are happy with them. Don't forget to use the "[Self review checklist](https://docs.github.com/en/contributing/collaborating-on-github-docs/self-review-checklist)" to speed up the review process :zap:.
 
 ### Pull Request
 

contributing/development.md

@@ -44,7 +44,7 @@ The [`src/bookmarklets`](../src/bookmarklets) directory contains some browser sh
 
 By default the local server won't run with all supported languages enabled.  If you need to run the server with a particular language, you can temporarily edit the `start` script in `package.json` and update the `ENABLED_LANGUAGES` variable.  For example, to enable Japanese and Portuguese, you can set it to `ENABLED_LANGUAGES='en,ja,pt'` and then you need to restart the server for the change to take effect.
 
-The supported language codes are defined in [lib/languages.js](#src/languages/lib/languages.js).
+The supported language codes are defined in [lib/languages.js](../src/languages/lib/languages.js).
 
 ## Site structure
 
@@ -69,6 +69,5 @@ For more info about working with this site, check out these READMEs:
 - [data/README.md](../data/README.md)
 - [data/reusables/README.md](../data/reusables/README.md)
 - [data/variables/README.md](../data/variables/README.md)
-- [src/content-render/README.md](src/content-render/README.md)
-- [includes/README.md](../includes/README.md)
-- [src/README.md](src/README.md)
+- [src/content-render/README.md](../src/content-render/README.md)
+- [src/README.md](../src/README.md)