docs(bubble): update messageRender type desc and fix typo (ant-design#1048)

Author: wzc520pyfm

components/bubble/index.en-US.md

@@ -56,7 +56,7 @@ Common props ref：[Common props](/docs/react/common-props)
 | typing | Show message with typing motion | boolean \| { step?: number, interval?: number } | false |  |
 | variant | Style variant | `filled` \| `borderless` \| `outlined` \| `shadow` | `filled` |  |
 | loadingRender | Customize loading content | () => ReactNode | - |  |
-| messageRender | Customize display content | <ContentType extends [BubbleContentType](https://github.com/ant-design/x/blob/d3232c925a0dc61ad763c6664e16f07323ebca4a/components/bubble/interface.ts#L21) = string>(content?: ContentType) => ReactNode | - |  |
+| messageRender | Customize display content | <ContentType extends [BubbleContentType](https://github.com/ant-design/x/blob/fc7a000f5ee0c3c75def63d2e47a328486b66465/components/bubble/interface.ts#L21) = string>(content?: ContentType) => ReactNode | - |  |
 | onTypingComplete | Callback when typing effect is completed. If typing is not set, it will be triggered immediately when rendering. | () => void | - |  |
 
 #### ContentType
@@ -70,7 +70,7 @@ type ContentType = React.ReactNode | AnyObject | string | number;
 Custom type usage
 
 ```tsx
-type CustomContentType {
+type CustomContentType = {
   ...
 }
 

components/bubble/index.zh-CN.md

@@ -57,7 +57,7 @@ demo:
 | typing | 设置聊天内容打字动画 | boolean \| { step?: number, interval?: number } | false |  |
 | variant | 气泡样式变体 | `filled` \| `borderless` \| `outlined` \| `shadow` | `filled` |  |
 | loadingRender | 自定义渲染加载态内容 | () => ReactNode | - |  |
-| messageRender | 自定义渲染内容 | (content?: ContentType) => ReactNode | - |  |
+| messageRender | 自定义渲染内容 | <ContentType extends [BubbleContentType](https://github.com/ant-design/x/blob/fc7a000f5ee0c3c75def63d2e47a328486b66465/components/bubble/interface.ts#L21) = string>(content?: ContentType) => ReactNode | - |  |
 | onTypingComplete | 打字效果完成时的回调，如果没有设置 typing 将在渲染时立刻触发 | () => void | - |  |
 
 #### ContentType
@@ -71,7 +71,7 @@ type ContentType = React.ReactNode | AnyObject | string | number;
 自定义类型使用
 
 ```tsx
-type CustomContentType {
+type CustomContentType = {
   ...
 }