docs: fix npx sv create command (#13765)

Author: ndri

packages/package/README.md

@@ -5,7 +5,7 @@
 The quickest way to get started is via the [sv](https://npmjs.com/package/sv) package:
 
 ```bash
-npm sv create my-app
+npx sv create my-app
 cd my-app
 npm install
 npm run dev