Update README.md

Author: xxxsf

README.md

@@ -24,8 +24,7 @@ npx create-quark-element
 
 ```
 cd my-element
-npm install
-npm start
+npm run dev
 ```
 
 Then open http://localhost:3000/ to see your app.
@@ -62,4 +61,4 @@ Use it as a normal html element in various frameworks (React/Vue/Angular/JQ):
 
 ```html
 <my-component></my-component>
-```
+```