libtapi: correct license metadata

https://github.com/tpoechtrager/apple-libtapi/blob/664b8414f89612f2dfd35a9b679c345aa5389026/LICENSE.APPLE-LIBTAPI.txt
https://github.com/apple-oss-distributions/tapi/blob/main/LICENSE.TXT

pkgs/os-specific/darwin/libtapi/default.nix

···
   meta = with lib; {
     description = "Replaces the Mach-O Dynamic Library Stub files in Apple's SDKs to reduce the size";
     homepage = "https://github.com/tpoechtrager/apple-libtapi";
-    license = licenses.apsl20;
+    license = licenses.ncsa;
     maintainers = with maintainers; [ matthewbauer ];
   };
 }