[polari] appdata: Add release notes

[Florian Müllner <fmuellner src gnome org>]

commit 5d414d3852124d8845f44d4f9accb33ab5a5d8f2
Author: Florian Müllner <fmuellner gnome org>
Date:   Tue Sep 12 19:39:49 2017 +0200

    appdata: Add release notes
    
    Meh, forget that again before the tarball ...

 data/appdata/org.gnome.Polari.appdata.xml.in |   15 ++++-----------
 1 files changed, 4 insertions(+), 11 deletions(-)
---
diff --git a/data/appdata/org.gnome.Polari.appdata.xml.in b/data/appdata/org.gnome.Polari.appdata.xml.in
index 00956f3..bb91199 100644
--- a/data/appdata/org.gnome.Polari.appdata.xml.in
+++ b/data/appdata/org.gnome.Polari.appdata.xml.in
@@ -52,21 +52,14 @@
   </kudos>
   <translation type="gettext">polari</translation>
   <releases>
-    <release version="3.24.0" date="2017-03-20">
+    <release version="3.26.0" date="2017-09-12">
       <description>
         <p>
-           This release is part of the GNOME 3.24 update. Highlights include:
+           This release is part of the GNOME 3.26 update. Highlights include:
         </p>
         <ul>
-          <li>Nicks in the chat log have a contextual popover with
-              useful information and actions</li>
-          <li>The join dialog now shows existing rooms that can be joined
-              by selecting one or more</li>
-          <li>Polari can now keep running in the background when the
-              window is closed</li>
-          <li>Typed messages are now spell-checked</li>
-          <li>The Polari Flatpak now works without installing additional
-              packages on the system</li>
+          <li>A guided initial setup mode on first run to assist new users</li>
+          <li>An integrated dialog to easily insert Emoji characters</li>
         </ul>
       </description>
     </release>