Update vsc-extension-quickstart.md

Co-authored-by: Julien <[email protected]>

vsc-extension-quickstart.md

@@ -2,7 +2,7 @@
 
 ## What's in the folder
 
--   This folder contains all of the files necessary for your extension.
+-   This folder contains all of the necessary files for your extension.
 -   `package.json` - this is the manifest file in which you declare your extension and command.
     -   The sample plugin registers a command and defines its title and command name. With this information VS Code can show the command in the command palette. It doesn’t yet need to load the plugin.
 -   `src/extension.ts` - this is the main file where you will provide the implementation of your command.