Update .CONTRIBUTING.md

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

Author: brunopgalvao

.CONTRIBUTING.md

@@ -214,7 +214,7 @@ tutorials/
 ### Set Up Directory Structure
 
 ```
-tutorials/[section]/<subsection>/<tutorial-name>.md
+tutorials/<section>/<subsection>/<tutorial-name>.md
 images/tutorials/<section>/<subsection>/<tutorial-name>/
 .snippets/code/tutorials/<section>/<subsection>/<tutorial-name>/
 ```