add typo fix for running snapshot tests
add typo fix for running snapshot tests

- When trying to run tests with 'npx test storybook.test.js' nothing seemed to happen for me. 
- Tried 'npm test storybook.test.js' and the tests ran so I guessed it may have been a typo!
storybooks/storybook,storybooks/storybook,storybooks/storybook,storybooks/storybook,storybooks/storybook,storybooks/storybook,storybooks/storybook