Summary:
This just slightly alters the showcase rules to say that a technical blog post should be company-branded. Better to make exceptions the other way for particularly good posts, rather than to complain to people who are following the rules that the post doesn't seem "showcaseworthy".
Closes https://github.com/facebook/react-native/pull/9455
Differential Revision: D3733436
Pulled By: hramos
fbshipit-source-id: 572eb9f56b1f3a9c1af2362384d199a8ab5058ac