Fixed the homepage URL

allocations.gemspec

@@ -6,7 +6,7 @@ Gem::Specification.new do |gem|
   gem.authors     = ['Yorick Peterse']
   gem.email       = 'yorickpeterse@gmail.com'
   gem.summary     = 'Tracking of retained objects in CRuby'
-  gem.homepage    = 'https://gitlab.com/gitlab/allocations'
+  gem.homepage    = 'https://gitlab.com/gitlab-org/allocations'
   gem.description = gem.summary
   gem.license     = 'MIT'
   gem.extensions  = ['ext/liballocations/extconf.rb']