Add 0.4.3 release notes to metainfo.

Author: saivert

data/com.saivert.pwvucontrol.metainfo.xml.in.in

@@ -22,7 +22,15 @@
   <url type="bugtracker">https://github.com/saivert/pwvucontrol/issues</url>
   <content_rating type="oars-1.0" />
   <releases>
-    <release version="0.4.2" date="2023-12-21">
+    <release version="0.4.3" date="2024-06-15">
+      <description>
+        <p>Changelog since 0.4.2</p>
+        <ul>
+          <li>Added new icons for input and output devices.</li>
+        </ul>
+      </description>
+    </release>
+    <release version="0.4.2" date="2024-06-13">
       <description>
         <p>Changelog since 0.3.1</p>
         <ul>