[clickable_nicknames] Update manifest.ini

clickable_nicknames/manifest.ini

 [info]
 name: Clickable Nicknames
 short_name: clickable_nicknames
-version: 1.2.1
+version: 1.2.2
 description: Clickable nicknames in the conversation textview.
 authors: Andrey Musikhin <melomansegfault@gmail.com>
  Denis Fomin <fominde@gmail.com>
+ Philipp Hörist <philipp@hoerist.com>
 homepage: https://dev.gajim.org/gajim/gajim-plugins/wikis/ClickableNicknamesPlugin
 min_gajim_version: 1.1.91
 max_gajim_version: 1.2.90