(ai-shopping-assistant): swap install script to pnpm

Author: kenjonespizza

ai-shopping-assistant/README.md

@@ -40,7 +40,7 @@ An ecommerce storefront with an AI shopping assistant that operates directly on
 ### 1. Create the project
 
 ```bash
-npm create sanity@latest -- --template sanity-labs/starters/ai-shopping-assistant
+pnpm create sanity@latest --template sanity-labs/starters/ai-shopping-assistant
 ```
 
 This scaffolds the project and walks you through Sanity project setup.