docs(vant-use): fix docs type (#11844)

* docs(useClickAway): fix docs type

* docs(useCountDown): fix docs type

packages/vant/docs/markdown/use-click-away.en-US.md

@@ -64,7 +64,10 @@ type Options = {
 };
 
 function useClickAway(
-  target: Element | Ref<Element | undefined>,
+  target:
+    | Element
+    | Ref<Element | undefined>
+    | Array<Element | Ref<Element | undefined>>,
   listener: EventListener,
   options?: Options
 ): void;

packages/vant/docs/markdown/use-click-away.zh-CN.md

@@ -66,7 +66,10 @@ type Options = {
 };
 
 function useClickAway(
-  target: Element | Ref<Element | undefined>,
+  target:
+    | Element
+    | Ref<Element | undefined>
+    | Array<Element | Ref<Element | undefined>>,
   listener: EventListener,
   options?: Options
 ): void;

packages/vant/docs/markdown/use-count-down.en-US.md

@@ -93,7 +93,7 @@ function useCountDown(options: UseCountDownOptions): CountDown;
 | time | Total time, unit milliseconds | _number_ | - |
 | millisecond | Whether to enable millisecond render | _boolean_ | `false` |
 | onChange | Triggered when count down changed | _(current: CurrentTime) => void_ | - |
-| onFinish | Triggered when count down finished | - |
+| onFinish | Triggered when count down finished | _() => void_ | - |
 
 ### Return Value
 

packages/vant/docs/markdown/use-count-down.zh-CN.md

@@ -97,7 +97,7 @@ function useCountDown(options: UseCountDownOptions): CountDown;
 | time | 倒计时时长，单位毫秒 | _number_ | - |
 | millisecond | 是否开启毫秒级渲染 | _boolean_ | `false` |
 | onChange | 倒计时改变时触发的回调函数 | _(current: CurrentTime) => void_ | - |
-| onFinish | 倒计时结束时触发的回调函数 | - |
+| onFinish | 倒计时结束时触发的回调函数 | _() => void_ | - |
 
 ### 返回值