chore(docs): typo (#566)
chore(docs): typo (#566)

Summary:
## Changelog
Pull Request resolved: https://github.com/facebook/flipper/pull/566

Differential Revision: D17737731

Pulled By: passy

fbshipit-source-id: f2aac8d7b256b3d2849942c42581046944bc11c9

facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper,facebook/flipper