Update Italian program translation

[guillem@debian.org:
 - Move package version (%s) besides package name %s.
 - Update missed translation.
 - Replace a ; with a :.
 - Fix few typos. ]

Closes: #750105

Signed-off-by: Guillem Jover <guillem@debian.org>

debian/changelog

@@ -47,6 +47,9 @@ dpkg (1.17.10) UNRELEASED; urgency=low
   * Do not mangle quilt series files with a missing newline on the last line.
     Closes: #584233
 
+  [ Updated programs translations ]
+  * Italian (Milo Casagrande). Closes: #750105
+
   [ Updated scripts translations ]
   * German (Helge Kreutzmann).