me-web? 0.15.1: the F-Droid repository is signed with the app's own key

- The Arasaka F-Droid repository, packages.arasaka.software/fdroid/repo, is signed with the same key as the app, so
  the fingerprint F-Droid or Obtainium checks is the one already on the download page for the APK.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01T9uhaCTSycTh1r8At679Pz

Directory.Build.props

@@ -1,6 +1,6 @@
 <Project>
   <PropertyGroup>
-    <Version>0.15.0</Version>
+    <Version>0.15.1</Version>
     <Product>me-web?</Product>
     <Company>Arasaka di Hvozdikov Yevheniy</Company>
     <Copyright>© 2026 Arasaka di Hvozdikov Yevheniy</Copyright>