message: Add documentation for lock buttons
diff: @@ -6,8 +6,8 @@ The default React Query Builder components, being basic HTML5 form controls, are
  Official components compatible with several popular style libraries are available under the [`@react-querybuilder` org on npm](https://www.npmjs.com/org/react-querybuilder). Current supported libraries include:
  -- [Bootstrap](https://getbootstrap.com/) ([@react-querybuilder/bootstrap](https://www.npmjs.com/package/@react-querybuilder/bootstrap))
  - [Ant Design](https://ant.design/) ([@react-querybuilder/antd](https://www.npmjs.com/package/@react-querybuilder/antd))
  +- [Bootstrap](https://getbootstrap.com/) ([@react-querybuilder/bootstrap](https://www.npmjs.com/package/@react-querybuilder/bootstrap))
  - [Bulma](https://bulma.io/) ([@react-querybuilder/bulma](https://www.npmjs.com/package/@react-querybuilder/bulma))
  - [Chakra UI](https://chakra-ui.com/) ([@react-querybuilder/chakra](https://www.npmjs.com/package/@react-querybuilder/chakra))
  - [MUI](https://mui.com/) ([@react-querybuilder/material](https://www.npmjs.com/package/@react-querybuilder/material))
  