message: docs(storybook): fix wrong function name
diff: @@ -66,13 +66,15 @@ MyStory.parameters = {
  Returning data for multiple queries (conditional response).
  ```tsx
  +import { getOperationName } from 'urql';
  +
  MyStory.parameters = {
  urql: op => {
  - if (getQueryName(op.query) === 'GetUser') {
  + if (getOperationName(op.query) === 'GetUser') {
  return { data: { user: { id: 1234, name: 'Steve' } } };
  }
  - if (getQueryName(op.query) === 'GetFeed') {
  + if (getOperationName(op.query) === 'GetFeed') {
  return { data: { feed: [{ id: 1, title: 'Fake news' }] } };
  }
  },
  