python.pkgs.jsbeautifier: fix name

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

···
 buildPythonApplication rec {
   pname = "jsbeautifier";
   version = "1.7.4";
-  name = "jsbeautifier-1.6.14";
+  name = "${pname}-${version}";
 
   propagatedBuildInputs = [ six ];