Fix typo

Author: pitbulk

ruby-saml.gemspec

@@ -7,7 +7,7 @@ Gem::Specification.new do |s|
 
   s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
   s.authors = ["SAML Toolkit", "Sixto Martin"]
-  s.emais = ['contact@iamdigitalservices.com', 'sixto.martin.garcia@gmail.com']
+  s.email = ['contact@iamdigitalservices.com', 'sixto.martin.garcia@gmail.com']
   s.date = Time.now.strftime("%Y-%m-%d")
   s.description = %q{SAML Ruby toolkit. Add SAML support to your Ruby software using this library}
   s.license = 'MIT'