message: [Doc] Collapse: fix Events param type
diff: @@ -97,7 +97,7 @@ export default {
  | Event | Description | Arguments |
  |------|------|------|
  -| change | Triggered when switch panel | activeNames: `string | array` |
  +| change | Triggered when switch panel | activeNames: `string[] | number[] | string | number` |
  ### CollapseItem Props
  