debian/changelog: Update

Change-Id: Icc0d268e806d4907d3ac206eb5a23ddd5130cced
Signed-off-by: Philippe Coval <rzr@users.sf.net>

debian/changelog

+iotjs (1.0+715-1ubuntu1) unstable; urgency=medium
+
+  [ Xavier Guimard ]
+  * Remove alternative build dep on Python (Closes: #972975)
+
+ -- Philippe Coval <rzr@users.sf.net>  Tue, 15 Dec 2020 06:50:29 +0100
+
 iotjs (1.0+715-1) unstable; urgency=medium
 
   * New upstream snapshot "release_1.0-715-g7fdafb0e" (Closes: #972228)