python: pyobjc: 4.0b1 -> 4.1

pkgs/development/python-modules/pyobjc/default.nix

···
 buildPythonPackage rec {
   name = "${pname}-${version}";
   pname = "pyobjc";
-  version = "4.0b1";
+  version = "4.1";
 
   # Gives "No matching distribution found for
   # pyobjc-framework-Collaboration==4.0b1 (from pyobjc==4.0b1)"
···
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "16bng6960c1m57nnh1l09ycnyimrqzw9mx9pnyjxn5zzm5kalr37";
+    sha256 = "287db11f912ac7d05c4907dbf6e74abaa475e36368f7c92e05aca2886a94562c";
   };
 
   meta = {