Add missing newline in changelog.

debian/changelog

@@ -23,6 +23,7 @@ tails (2.2~rc1) unstable; urgency=medium
         disk. (Closes: #11133)
       * Add missing argument to OpenPGP dialog so the optional OpenPGP
         key can be added again. (Closes: #11033)
+
   * Minor improvements
     - Upgrade I2P to 0.9.24-1~deb8u+1.
     - Add support for viewing DRM protected DVD videos using