Have OSS build pick 'fizz' from 'main' (instead of 'master')

Summary: Have OSS build pick 'fizz' from 'main' (instead of 'master')

Reviewed By: knekritz

Differential Revision: D31173527

fbshipit-source-id: a223768b8d6568a6f979683d612c2bf36e1faafb

build/fbcode_builder/manifests/fizz

@@ -6,6 +6,7 @@ shipit_fbcode_builder = true
 
 [git]
 repo_url = https://github.com/facebookincubator/fizz.git
+rev = main
 
 [build]
 builder = cmake