message: metainfo.xml: Prepare release 0.3.4
diff: <releases>
  <!-- unreleased: TODO: Don't forget to add date attribute to it. -->
  - <release version="0.3.4" urgency="medium" type="development">
  + <!--
  + <release version="x.y.z" urgency="medium" type="development">
  + <description>
  + <ul>
  + </ul>
  + </description>
  + </release>
  + -->
  +
  + <release version="0.3.4" urgency="medium" date="2022-09-13">
  <description>
  <ul>
  <li>Fixes selection magically deselecting when indicator status line was shown and the top page line was selected.</li>
  