docs: add that setup is needed after cleaning for challenge editor (#1164)

Author: majestic-owl448

src/content/docs/how-to-work-on-workshops.mdx

@@ -44,7 +44,7 @@ These instructions will tell you how to use our challenge editor tool to work on
 
 ### Setting Up the Challenge Editor
 
-The first time you want to use the editor, make sure you are in the root freeCodeCamp directory and run: `pnpm challenge-editor-setup`.
+The first time you want to use the editor, and after you use `clean` commands (like `clean-and-develop`), make sure you are in the root freeCodeCamp directory and run: `pnpm challenge-editor-setup`.
 
 ### Starting the Editor