[now_listen] Update manifest.ini

now_listen/manifest.ini

 [info]
 name: Now Listen
 short_name: now_listen
-version: 1.2.2
+version: 1.2.3
 description: Allows you to paste info about the music you are playing (use by pressing Alt+N in the message input).
 authors = Denis Fomin <fominde@gmail.com>
 homepage = https://dev.gajim.org/gajim/gajim-plugins/wikis/NowListenPlugin