Rename public certificate

Author: sferik

public_cert.pem certs/sferik.pem

@@ -21,7 +21,7 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'sass-rails', '~> 3.1'
   spec.add_development_dependency 'bundler', '~> 1.0'
   spec.authors = ["Erik Michaels-Ober", "Bogdan Gaza", "Petteri Kaapa", "Benoit Benezech"]
-  spec.cert_chain = ['public_cert.pem']
+  spec.cert_chain = ['certs/sferik.pem']
   spec.description = %q{RailsAdmin is a Rails engine that provides an easy-to-use interface for managing your data.}
   spec.email = ['[email protected]', '[email protected]', '[email protected]']
   spec.files = Dir['Gemfile', 'LICENSE.md', 'README.md', 'Rakefile', 'app/**/*', 'config/**/*', 'lib/**/*', 'public/**/*']