po: Update Simplified Chinese programs translation

Closes: #765693

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

debian/changelog

@@ -11,6 +11,7 @@ dpkg (1.17.19) UNRELEASED; urgency=low
   [ Updated programs translations ]
   * Italian (Milo Casagrande): Closes: #765748
   * Turkish (Mert Dirik). Closes: #764942
+  * Simplified Chinese (lumin). Closes: #765693
 
   [ Updated scripts translations ]
   * German (Helge Kreutzmann).