missed updating rails-hyperspec gemspec

Author: catmando

ruby/rails-hyperstack/rails-hyperstack.gemspec

@@ -11,7 +11,7 @@ Gem::Specification.new do |spec|
   spec.authors     = ['Loic Boutet', 'Adam George', 'Mitch VanDuyn', 'Jan Biedermann']
   spec.email       = ['loic@boutet.com', 'jan@kursator.com']
   spec.homepage    = 'http://hyperstack.org'
-  spec.metadata    = { documentation_uri: 'https://docs.hyperstack.org/' }
+  spec.metadata    = { 'documentation_uri' => 'https://docs.hyperstack.org/' }
   spec.license     = 'MIT'
   # spec.metadata = {
   #   "homepage_uri" => 'http://hyperstack.org',