Mark Tails 4.1 as released.

debian/changelog

-tails (4.1) UNRELEASED; urgency=medium
+tails (4.1) unstable; urgency=medium
 
   * Major changes
     - Upgrade Tor Browser to 9.0.2-build2, based on Firefox ESR 68.3.
@@ -91,7 +91,7 @@ tails (4.1) UNRELEASED; urgency=medium
       method (Closes: #17204).
     - Add a warning about which Tails to run rsync from (Closes: #17197).
 
- -- Tails developers <tails@boum.org>  Mon, 02 Dec 2019 14:47:34 +0100
+ -- Tails developers <tails@boum.org>  Mon, 02 Dec 2019 22:23:35 +0100
 
 tails (4.0) unstable; urgency=medium