[release]: Update Flatpak manifest

Author: mr-cheffy

app.zen_browser.zen.metainfo.xml

@@ -59,7 +59,7 @@
     <control>keyboard</control>
   </supports>
   <releases>
-    <release version="1.12.10b" date="2025-06-01T13:42:14.762Z">
+    <release version="1.12.10b" date="2025-06-01T19:58:45.890Z">
       <url type="details">https://zen-browser.app/release-notes/1.12.10b</url>
     </release>
     <release version="1.12.9b" date="2025-05-31T07:05:07.202Z">