Update getting started reference (#118)
Update getting started reference (#118)

Summary:
Mention latest published version `0.0.8`.
Closes https://github.com/facebook/Sonar/pull/118

Reviewed By: priteshrnandgaonkar

Differential Revision: D8694476

Pulled By: passy

fbshipit-source-id: 7fc536dde44313eff09a64611d4c942d4f52fa1f

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