Add 21.12.3 release notes

src/app/org.kde.itinerary.appdata.xml

@@ -635,7 +635,14 @@
   </provides>
   <launchable type="desktop-id">org.kde.itinerary.desktop</launchable>
   <releases>
-    <release version="21.12.3" date="2022-03-03"/>
+    <release version="21.12.3" date="2022-03-03">
+      <description>
+        <ul>
+          <li>Add travel data extraction from Air France ticket PDF documents.</li>
+          <li>Fix locale-aware formatting of numbers.</li>
+        </ul>
+      </description>
+    </release>
     <release version="21.12.2" date="2022-02-03">
       <description>
         <ul>
@@ -673,6 +680,51 @@
         </ul>
       </description>
     </release>
+    <release version="21.08.3" date="2021-11-04">
+      <description>
+        <ul>
+          <li>Fix icon size issues on high DPI screens.</li>
+          <li>Fix map panning leaving the favorite location selector page.</li>
+          <li>Fix determining departure country for location changes.</li>
+          <li>Fix erroneous merging of train trips with the same line on the same day.</li>
+          <li>Fix parsing of OTP rental vehicle information.</li>
+          <li>Apply timezone information correctly to flight reservations with incomplete time information.</li>
+          <li>Improved data extraction for various providers.</li>
+        </ul>
+      </description>
+    </release>
+    <release version="21.08.2" date="2021-10-07">
+      <description>
+        <ul>
+          <li>Add support for SMART Health Card (SHC) vaccination certificates.</li>
+          <li>Don't trigger the connection warning when there is no previous arrival time.</li>
+          <li>Show correct number of attached documents for multi-traveller trips.</li>
+          <li>Show escalators to/from intermediate floor levels correctly in the indoor map. </li>
+          <li>Fix rendering of Apple Wallet pass rich-text back fields.</li>
+          <li>Improved data extraction for SNCF, Accor, Feratel and onepagebooking.</li>
+        </ul>
+      </description>
+    </release>
+    <release version="21.08.1" date="2021-09-02">
+      <description>
+        <ul>
+          <li>Properly import mail attachments shared from FairEmail.</li>
+          <li>Improvements for importing data from Airdo, MÁV, Regionado, Ryanair and SNCF.</li>
+        </ul>
+      </description>
+    </release>
+    <release version="21.08.0" date="2021-08-12">
+      <description>
+        <ul>
+          <li>Health certificate manager for DIVOC and EU DGC vaccination, test and recovery certificates.</li>
+          <li>GPX import and export of favorite locations and GPX export of trips for Nextcloud Maps interoperability.</li>
+          <li>Support for local German public transport operators INVG, RSAG, VRT and VSN.</li>
+          <li>Improved travel document extractor.</li>
+          <li>Various fixes to the page flow.</li>
+          <li>Entire trip groups can now be deleted.</li>
+        </ul>
+      </description>
+    </release>
   </releases>
   <custom>
     <value key="KDE::f_droid">https://community.kde.org/Android/FDroid#KDE_F-Droid_Release_Repository</value>