document use of {% raw %} (#22216)

Co-authored-by: mc <42146119+mchammer01@users.noreply.github.com>

contributing/content-style-guide.md

@@ -48,6 +48,19 @@ Keep lines in code samples to about 60 characters, to avoid requiring readers to
 Within code blocks:
 - Do not use markup before the command output.
 - Only use `$` before the command itself if you’re showing the command’s output in the same block.
+- If your code example includes `{` or `}` that should render, wrap that section in `{% raw %}` `{% endraw %}` to disable Liquid processing for that section.
+  - **Use**:
+
+    ```
+    GITHUB_TOKEN: {% raw %}${{ secrets.GITHUB_TOKEN }}{% endraw %}
+    ```
+
+  - **Avoid**:
+ 
+    ```
+    GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+    ```
+
 
 ### Commands
 

contributing/troubleshooting.md

@@ -115,3 +115,19 @@ During development, you can visit any page on `http://localhost:4000` and add `?
 | `redirect_from` | Shows the hardcoded redirects in the [`redirect_from` frontmatter](content#redirect_from).
 | `redirects` | Shows all redirects that the site is generating for the page.
 | `includesPlatformSpecificContent` | Shows whether the site detects any [platform-specific content](#operating-system-tags) on the page.
+
+## Liquid processing
+
+If your text or code example includes `{` or `}` that should render, you need to wrap it in `{% raw %}` `{% endraw %}` to disable Liquid processing for that section. For example:
+
+- **Use**:
+
+  ```
+  GITHUB_TOKEN: {% raw %}${{ secrets.GITHUB_TOKEN }}{% endraw %}
+  ```
+
+- **Avoid**:
+
+  ```
+  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+  ```