chore: add 2026.05.22 release entry to metainfo

Author: l3lackcurtains

flatpak/com.besoeasy.gupt.metainfo.xml

@@ -55,6 +55,11 @@
   <content_rating type="oars-1.1" />
 
   <releases>
+    <release version="2026.05.22" date="2026-05-22">
+      <description>
+        <p>UI polish, code cleanup, and stable Web Storage port.</p>
+      </description>
+    </release>
     <release version="0.1.24" date="2026-05-14">
       <description>
         <p>Replace the previous desktop runtime with a lightweight GTK/WebKit Flatpak shell.</p>