try specifying maccatalyst 17.2

Author: ericsink

version_stamp/version_stamp.cs

@@ -113,7 +113,7 @@ private static void gen_directory_build_props(string root, string nupkgs_dir_nam
             f.WriteElementString("tfm_windows", "net8.0-windows");
             f.WriteElementString("tfm_ios", "net8.0-ios");
             f.WriteElementString("tfm_tvos", "net8.0-tvos");
-            f.WriteElementString("tfm_maccatalyst", "net8.0-maccatalyst");
+            f.WriteElementString("tfm_maccatalyst", "net8.0-maccatalyst17.2");
 
             f.WriteComment("The NoNFloatUsing below is a workaround for xamarin/xamarin-macios/#14434");
             f.WriteElementString("NoNFloatUsing", "true");