docs: make accordion mode easier to understand (#48972)

components/collapse/demo/accordion.md

@@ -1,6 +1,6 @@
 ## zh-CN
 
-手风琴，每次只打开一个 tab。
+手风琴模式，始终只有一个面板处在激活状态。
 
 ## en-US
 

components/collapse/index.en-US.md

@@ -79,7 +79,7 @@ Common props ref：[Common props](/docs/react/common-props)
 | Property | Description | Type | Default | Version |
 | --- | --- | --- | --- | --- |
 | accordion | If true, Collapse renders as Accordion | boolean | false |  |
-| activeKey | Key of the active panel | string\[] \| string <br/> number\[] \| number | No default value. In `accordion` mode, it's the key of the first panel |  |
+| activeKey | Key of the active panel | string\[] \| string <br/> number\[] \| number | No default value. In [accordion mode](#components-collapse-demo-accordion), it's the key of the first panel |  |
 | bordered | Toggles rendering of the border around the collapse block | boolean | true |  |
 | collapsible | Specify whether the panels of children be collapsible or the trigger area of collapsible | `header` \| `icon` \| `disabled` | - | 4.9.0 |
 | defaultActiveKey | Key of the initial active panel | string\[] \| string <br/> number\[] \| number | - |  |

components/collapse/index.zh-CN.md

@@ -80,7 +80,7 @@ const items: CollapseProps['items'] = [
 | 参数 | 说明 | 类型 | 默认值 | 版本 |
 | --- | --- | --- | --- | --- |
 | accordion | 手风琴模式 | boolean | false |  |
-| activeKey | 当前激活 tab 面板的 key | string\[] \| string <br/> number\[] \| number | 默认无，accordion 模式下默认第一个元素 |  |
+| activeKey | 当前激活 tab 面板的 key | string\[] \| string <br/> number\[] \| number | [手风琴模式](#components-collapse-demo-accordion)下默认第一个元素 |  |
 | bordered | 带边框风格的折叠面板 | boolean | true |  |
 | collapsible | 所有子面板是否可折叠或指定可折叠触发区域 | `header` \| `icon` \| `disabled` | - | 4.9.0 |
 | defaultActiveKey | 初始化选中面板的 key | string\[] \| string<br/> number\[] \| number | - |  |