Fix broken link

wiki/src/todo/symmetric_OpenPGP_vs_recent_Iceweasel.mdwn

@@ -13,7 +13,8 @@ upstream](http://blog.getfiregpg.org/2010/06/07/firegpg-discontinued/)
 is known [not to work with
 FF4+](http://blog.getfiregpg.org/2011/04/01/firegpg-and-firefox-4/)
 "because of the missing IPC library", and generally is
-[[a security mess|bugs/FireGPG_may_be_unsafe]].
+[[a security
+mess|doc/encryption_and_privacy/FireGPG_susceptible_to_devastating_attacks]].
 
 We need to find a way to support symmetric OpenPGP encryption in
 Tails.