docs: use npm install in README

Author: afc163

README.md

@@ -48,7 +48,7 @@ export default () => <TextArea autoSize showCount maxLength={100} />;
 Run the local dumi site:
 
 ```bash
-ut install
+npm install
 npm start
 ```
 
@@ -128,7 +128,7 @@ textareaRef.current?.blur();
 ## Development
 
 ```bash
-ut install
+npm install
 npm start
 npm test
 npm run tsc

README.zh-CN.md

@@ -48,7 +48,7 @@ export default () => <TextArea autoSize showCount maxLength={100} />;
 运行本地 dumi 站点：
 
 ```bash
-ut install
+npm install
 npm start
 ```
 
@@ -128,7 +128,7 @@ textareaRef.current?.blur();
 ## 本地开发
 
 ```bash
-ut install
+npm install
 npm start
 npm test
 npm run tsc