Use https:// link homepage in gemspec

Author: olleolleolle

redis-actionpack.gemspec

@@ -7,7 +7,7 @@ Gem::Specification.new do |s|
   s.version     = Redis::ActionPack::VERSION
   s.authors     = ['Luca Guidi']
   s.email       = ['[email protected]']
-  s.homepage    = 'http://redis-store.org/redis-actionpack'
+  s.homepage    = 'https://redis-store.org/redis-actionpack/'
   s.summary     = %q{Redis session store for ActionPack}
   s.description = "#{s.summary}. Used for storing the Rails session in Redis."
   s.license     = 'MIT'