message: [Doc] Dialog: fix get-container props default value
diff: @@ -152,7 +152,7 @@ export default {
  | close-on-click-overlay | Whether to close when click overlay | `Boolean` | `false` |
  | lock-scroll | Whether to lock background scroll | `Boolean` | `true` |
  | before-close | Callback before close,<br>call done() to close dialog,<br>call done(false) to cancel loading | (action: string, done: function) => void | - |
  -| get-container | Return the mount node for Dialog | `String | () => HTMLElement` | `body` |
  +| get-container | Return the mount node for Dialog | `String | () => HTMLElement` | - |
  ### Events
  