Fix links [ci skip]

guides/source/security.md

@@ -192,9 +192,9 @@ rotations going at any one time.
 For more details on key rotation with encrypted and signed messages as
 well as the various options the `rotate` method accepts, please refer to
 the
-[MessageEncryptor API](api.rubyonrails.org/classes/ActiveSupport/MessageEncryptor.html)
+[MessageEncryptor API](http://api.rubyonrails.org/classes/ActiveSupport/MessageEncryptor.html)
 and
-[MessageVerifier API](api.rubyonrails.org/classes/ActiveSupport/MessageVerifier.html)
+[MessageVerifier API](http://api.rubyonrails.org/classes/ActiveSupport/MessageVerifier.html)
 documentation.
 
 ### Replay Attacks for CookieStore Sessions