message: metainfo.xml: Adds changelog entry for background iamge fix.
diff: <description>
  <ul>
  <li>Fixes `initial_working_directory` setting being ignored (#946).</li>
  + <li>Fixes background image being accidentally inverted (Bug introduced in 0.3.3.204).</li>
  <li>Fixes linefeed not inheriting graphics attributes when scrolling up to create a new line (#945).</li>
  </ul>
  </description>
  