docs: update README

Author: Amour1688

README-zh_CN.md

@@ -119,26 +119,12 @@ const App = {
 
 v-model
 
-* 修饰符：使用 (`_`) 代替 (`.`) (`vModel_trim={this.test}`)
+> 注意：如果想要使用 `arg`, 第二个参数需要为字符串
 
 ```jsx
-export default {
-  data: () => ({
-    test: 'Hello World',
-  }),
-  render() {
-    return (
-      <>
-        <input type="text" vModel_trim={this.test} />
-        {this.test}
-      </>
-    )
-  },
-}
+<input vModel={val} />
 ```
 
-* 或者使用这种实现
-
 ```jsx
 <input vModel={[val, ['trim']]} />
 ```
@@ -174,8 +160,6 @@ const App = {
 }
 ```
 
-> 注意：如果想要使用 `arg`, 第二个参数需要为字符串
-
 ### 插槽 
 
 ```jsx

README.md

@@ -120,26 +120,12 @@ const App = {
 
 v-model
 
-* You can use underscore (`_`) instead of dot (`.`) for modifiers (`vModel_trim={this.test}`)
+> Note: You should pass the second param as string for using `arg`.
 
 ```jsx
-export default {
-  data: () => ({
-    test: 'Hello World',
-  }),
-  render() {
-    return (
-      <>
-        <input type="text" vModel_trim={this.test} />
-        {this.test}
-      </>
-    )
-  },
-}
+<input vModel={val} />
 ```
 
-* Or you can use this proposal.
-
 ```jsx
 <input vModel={[val, ['trim']]} />
 ```
@@ -175,8 +161,6 @@ const App = {
 }
 ```
 
-> Note: You should pass the second param as string for using `arg`.
-
 ### Slot 
 
 ```jsx