Fix category comment in folly logging example
Fix category comment in folly logging example

Summary: This category didn't account for the path change.

Reviewed By: Gownta

Differential Revision: D39114674

fbshipit-source-id: 61425f8002f41b5045e2ed5b09edc981760bec58

facebook/folly,facebook/folly,facebook/folly,facebook/folly,facebook/folly