Add release note for last two version

(cherry picked from commit 550d55cb1a)

org.kde.neochat.appdata.xml

@@ -340,11 +340,22 @@ to provide a convergent experience across multiple platforms.</p>
     <content_attribute id="social-chat">intense</content_attribute>
   </content_rating>
   <releases>
-    <release version="23.08.0" date="2023-08-24"/>
+    <release version="23.08.0" date="2023-08-24">
+      <url>https://kde.org/announcements/gear/23.08.0/#neochathttpsappskdeorgneochat</url>
+      <description>
+        <p>Apart from a visual overhaul, NeoChat can now display location events and also a map with the location of all the users currently broadcasting their location using Itineray's Matrix integration. Great for locating where your friends are.</p>
+      </description>
+    </release>
     <release version="23.04.3" date="2023-07-06"/>
     <release version="23.04.2" date="2023-06-08"/>
     <release version="23.04.1" date="2023-05-11"/>
     <release version="23.04.0" date="2023-04-20">
+      <url>https://kde.org/announcements/gear/23.04.0/#neochathttpsappskdeorgneochat</url>
+      <description>
+        <p>NeoChat improves its design with tweaks that provide a more compact layout and a simpler menu which works better for the collapsed room list.</p>
+        <p>We have also improved the video controls, added a new command /knock &lt;room-id&gt; to send a knock event to a room, and you can now edit a prior message inline, within the chat pane.</p>
+        <p>Other usability improvements include an overhaul of the keyboard navigation and shortcuts like Ctrl+PgUp/PgDn that allow you to skip from room to room.</p>
+      </description>
       <artifacts>
         <artifact type="binary" platform="x86_64-windows-msvc">
           <location>https://download.kde.org/stable/release-service/23.04.0/windows/neochat-23.04.0-512-windows-cl-msvc2019-x86_64.exe</location>