Add release 4.4.0 to appdata.xml

Author: ua741

auth/linux/packaging/enteauth.appdata.xml

@@ -18,6 +18,7 @@
         </screenshot>
     </screenshots>
     <releases>
+        <release version="4.4.0" date="2025-05-31" />
         <release version="4.3.8" date="2025-05-20" />
         <release version="4.2.4" date="2025-01-11" />
         <release version="4.0.3" date="2024-10-08" />