message: docs: fixes typo in README.md
diff: @@ -172,7 +172,7 @@ map: {
  | [compareWith] | `(a: any, b: any) => boolean` | `(a, b) => a === b` | no | A function to compare the option values with the selected values. The first argument is a value from an option. The second is a value from the selection(model). A boolean should be returned. |
  | dropdownPosition | `bottom` \| `top` \| `auto` | `auto` | no | Set the dropdown position on open |
  | [groupBy] | `string` \| `Function` | null | no | Allow to group items by key or function expression |
  -| [groupValue] | `(groupKey: string, cildren: any[]) => Object` | - | no | Function expression to provide group value |
  +| [groupValue] | `(groupKey: string, children: any[]) => Object` | - | no | Function expression to provide group value |
  | [selectableGroup] | `boolean` | false | no | Allow to select group when groupBy is used |
  | [selectableGroupAsModel] | `boolean` | true | no | Indicates whether to select all children or group itself |
  | [items] | `Array<any>` | `[]` | yes | Items array |
  