update build command (#35681)

docs/contributors/code/getting-started-with-code-contribution.md

@@ -39,7 +39,7 @@ npm run dev
 
 > Note: The install scripts require [Python](https://www.python.org/) to be installed and in the path of the local system. This might be installed by default for your operating system, or require downloading and installing.
 
-There are two ways to build your code. While developing, you probably will want to use `npm run dev` to run continuous builds automatically as source files change. The dev build also includes additional warnings and errors to help troubleshoot while developing. Once you are happy with your changes, you can run `npm build` to create optimized production build.
+There are two ways to build your code. While developing, you probably will want to use `npm run dev` to run continuous builds automatically as source files change. The dev build also includes additional warnings and errors to help troubleshoot while developing. Once you are happy with your changes, you can run `npm run build` to create optimized production build.
 
 Once built, Gutenberg is ready to be used as a WordPress plugin!