Mark Tails 3.2 as released.

debian/changelog

-tails (3.2) UNRELEASED; urgency=medium
+tails (3.2) unstable; urgency=medium
 
   * Major changes
     - Upgrade Linux packages to the Debian kernel 4.12.0-2, based on
@@ -157,7 +157,7 @@ tails (3.2) UNRELEASED; urgency=medium
     - Test suite: take into account that click-to-play is not required
       anymore for WebM videos in Tor Browser (Closes: #14586).
 
- -- Tails developers <tails@boum.org>  Mon, 25 Sep 2017 19:58:21 +0200
+ -- Tails developers <tails@boum.org>  Mon, 25 Sep 2017 22:23:01 +0200
 
 tails (3.1.1) UNRELEASED; urgency=medium