Don't issue message on sponsorship for sponsors

Author: kzu

src/dotnet-openai/Sponsors/CheckCommand.cs

@@ -37,6 +37,9 @@ public override int Execute(CommandContext context, CheckSettings settings)
             return MarkupLine(ThisAssembly.Strings.Unknown.Message(project, link));
 
         var manifest = SponsorLink.GetManifest("devlooped", ThisAssembly.Metadata.Funding.GitHub.devlooped, true);
+        if (manifest.Status == ManifestStatus.Valid)
+            return 0;
+
         if (manifest.Status == ManifestStatus.Unknown || manifest.Status == ManifestStatus.Invalid)
             return MarkupLine(ThisAssembly.Strings.Unknown.Message(project, link));