message: Fix import for createPlugin in example snippet
diff: @@ -18,7 +18,7 @@ import React from 'react';
  import { Button, Typography } from '@material-ui/core';
  import { CodeSnippet, EmptyState } from '@backstage/core-components';
  -const EXAMPLE = `import { createPlugin } from '@backstage/core';
  +const EXAMPLE = `import { createPlugin } from '@backstage/core-plugin-api';
  export default createPlugin({
  id: 'plugin-name',
  