Update .CONTRIBUTING.md

Co-authored-by: Erin Shaben <[email protected]>

Author: brunopgalvao

.CONTRIBUTING.md

@@ -156,7 +156,7 @@ To add a page to an existing section:
 
 To create an entirely new section of documentation:
 
-1. **Create directory structure**:
+1. Create directory structure:
 
    ```
    your-new-section/