GIT_SILENT Update Appstream for new release

(cherry picked from commit 73cdb8b5)

data/org.kde.kdenlive.appdata.xml

@@ -248,28 +248,10 @@
     </ul>
   </description>
   <releases>
+    <release version="22.12.0" date="2022-12-08"/>
     <release version="22.08.3" date="2022-11-03"/>
     <release version="22.08.2" date="2022-10-13"/>
     <release version="22.08.1" date="2022-09-08"/>
-    <release version="22.08.0" date="2022-08-18">
-      <url type="details">https://kdenlive.org/en/2022/08/kdenlive-22-08-released</url>
-      <description>
-        <p>
-                The 22.08 release brings exciting new features, many improvements and of course a bunch of fixes for a smooth editing experience. Check it out!
-            </p>
-        <p>
-                Some highlights:
-            </p>
-        <ul>
-          <li>Improved audio recording: countdown timer, ability to control the input level, live waveform while recording.</li>
-          <li>Global subtitle styling: adjust font, color, size, position etc.</li>
-          <li>Importing of .vtt (Web Video Text Tracks) and .sbv (YouTube) subtitle files.</li>
-          <li>Export guides as chapters for YouTube, etc.</li>
-          <li>Integration with Glaxnimate vector graphics animation program.</li>
-          <li>Added support of LOTTIE and RAWR animations and AVIF, HEIF, HEIC and JPEG XL image formats.</li>
-        </ul>
-      </description>
-    </release>
   </releases>
   <url type="homepage">https://kdenlive.org/</url>
   <url type="bugtracker">https://bugs.kde.org</url>