fix changelog too long lines

debian/changelog

 visp (3.3.0-4) unstable; urgency=medium
 
-  * Add patch to remove boost detection. Closes #962449 - remove boost detection in modules/ar/CMakeLists.txt - update cmake tools to generate visp.pc
+  * Add patch to remove boost detection (Closes: #962449)
+    - remove boost detection in modules/ar/CMakeLists.txt
+    - update cmake tools to generate visp.pc
 
  -- Fabien Spindler <Fabien.Spindler@inria.fr>  Fri, 12 Jun 2020 12:13:23 +0200