Update .CONTRIBUTING.md

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

Author: brunopgalvao

.CONTRIBUTING.md

@@ -165,7 +165,7 @@ To create an entirely new section of documentation:
    └── your-first-page.md
    ```
 
-2. **Create `.nav.yml`**:
+2. Create `.nav.yml`:
 
    ```yaml
    title: Section Display Name