[clients_icons] Update manifest.ini

clients_icons/manifest.ini

 [info]
 name: Clients icons
 short_name: clients_icons
-version: 7.1
+version: 7.2
 description: Shows client icons in roster and in groupchats.
 authors: Denis Fomin <fominde@gmail.com>
  Artem Klyop <art.klyop@gmail.com>