Mark Tails 3.0~beta2 as released.

debian/changelog

-tails (3.0~beta2) UNRELEASED; urgency=medium
+tails (3.0~beta2) unstable; urgency=medium
 
   * All changes brought by Tails 2.11, except:
     - the test suite changes, that are not all compatible with this branch;
@@ -26,7 +26,7 @@ tails (3.0~beta2) UNRELEASED; urgency=medium
     - Adapt firewall leak test to new DHCP source IP address.
     - Adjust Seahorse and Enigmail tests to the keyserver that is now used.
 
- -- Tails developers <tails@boum.org>  Wed, 08 Mar 2017 21:13:50 +0000
+ -- Tails developers <tails@boum.org>  Wed, 08 Mar 2017 16:29:44 +0000
 
 tails (2.11) unstable; urgency=medium