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

src/MeWeb.Shared/Endpoints.cs

@@ -78,7 +78,7 @@ public static class Endpoints
   public static class FDroid
   {
     public const string Repository = "https://packages.arasaka.software/fdroid/repo";
-    public const string Fingerprint = "42C47659B699E0B1A8BCF6F9CE2C4972972265B592BE32B5725B8F87C6BD0374";
+    public const string Fingerprint = "5F52CFF4F52F4E0B6DA6CD044BFCEAF78D1D42DB24F2470602DB7F19CBFDF846";
     public const string Add = $"{Repository}?fingerprint={Fingerprint}";
     public const string Obtainium = "obtainium://app/";
   }