flatpak: update metainfo (#4811)

scripts/flatpak/chat.simplex.simplex.metainfo.xml

@@ -38,6 +38,41 @@
   </description>
 
   <releases>
+    <release version="6.0.4" date="2024-08-31">
+      <url type="details">https://simplex.chat/blog/20240814-simplex-chat-vision-funding-v6-private-routing-new-user-experience.html</url>
+      <description>
+        <p>New in v6.0.1-4:</p>
+        <ul>
+          <li>reduce traffic and battery usage on unstable networks.</li>
+          <li>only offer the next versions for update, based on SerVer ordering.</li>
+          <li>UI fixes.</li>
+          <li>reduce app memory usage and start time.</li>
+          <li>faster sending of files to groups.</li>
+          <li>fix rare delivery bug.</li>
+        </ul>
+        <p>New in v6.0:</p>
+        <p>New chat experience:</p>
+        <ul>
+          <li>connect to your friends faster.</li>
+          <li>archive contacts to chat later.</li>
+          <li>delete up to 20 messages at once.</li>
+          <li>increase font size.</li>
+        </ul>
+        <p>New media options:</p>
+        <ul>
+          <li>play from the chat list.</li>
+          <li>blur for better privacy.</li>
+        </ul>
+        <p>Private routing:</p>
+        <ul>
+          <li>it protects your IP address and connections and is now enabled by default.</li>
+        </ul>
+        <p>Connection and servers information:</p>
+        <ul>
+          <li>to control your network status and usage.</li>
+        </ul>
+      </description>
+    </release>
     <release version="6.0.3" date="2024-08-24">
       <url type="details">https://simplex.chat/blog/20240814-simplex-chat-vision-funding-v6-private-routing-new-user-experience.html</url>
       <description>