[APIC] Update vscode-extension-basic-prerequisites.md

Update permissions

Author: dlepow

articles/api-center/includes/vscode-extension-basic-prerequisites.md

@@ -15,8 +15,8 @@ ms.custom: Include file
 
 * One or more API centers in your Azure subscription. 
 
-    * Currently, you need to be assigned the Contributor role or higher permissions to manage APIs with the extension.
+    * Currently, you need to be assigned the API Center Service Contributor role or higher permissions on an API center to manage APIs with the extension.
 
 * [Visual Studio Code](https://code.visualstudio.com/)
 
-* [Azure API Center extension for Visual Studio Code](https://marketplace.visualstudio.com/items?itemName=apidev.azure-api-center)
+* [Azure API Center extension for Visual Studio Code](https://marketplace.visualstudio.com/items?itemName=apidev.azure-api-center)