Metainfo: Add 8.1.0 release notes (#275)

Author: danirabbit

data/onboarding.metainfo.xml.in

@@ -52,6 +52,17 @@
   <update_contact>contact_at_elementary.io</update_contact>
 
   <releases>
+    <release version="8.1.0" date="2026-03-17" urgency="medium">
+      <description>
+        <ul>
+          <li>Updated translations</li>
+        </ul>
+      </description>
+      <issues>
+        <issue url="https://github.com/elementary/onboarding/issues/273">Explain ways to get to settings</issue>
+      </issues>
+    </release>
+    
     <release version="8.0.4" date="2025-11-25" urgency="medium">
       <description>
         <ul>