rubygems.org only has pre releases

Forwarded: not-needed

--- a/Gemfile
+++ b/Gemfile
@@ -425,7 +425,7 @@
 gem 'spamcheck', '~> 1.3'
 
 # Gitaly GRPC protocol definitions
-gem 'gitaly', '~> 15.9'
+gem 'gitaly', '~> 15.9.0-rc3'
 
 # KAS GRPC protocol definitions
 gem 'kas-grpc', '~> 0.1.0'