message: Update modal.mdx
  Changing the name from Message to Modal that shows up in the documentation site (https://circuit.sumup.com/#/components/modal)
diff: @@ -12,7 +12,7 @@ import Button from '../../../src/components/Button';
  import PropTable from '../../utils/PropTable';
  import { Wrapper } from '../../utils/Wrapper';
  -# Message
  +# Modal
  <Playground wrapper={Wrapper}>
  <ModalWrapper>
  