python3Packages.ec2instanceconnectcli: fix build, add missing cryptography dep

pkgs/tools/virtualization/ec2instanceconnectcli/default.nix

···
-{ lib, buildPythonPackage, fetchPypi, boto3 }:
+{ lib, buildPythonPackage, fetchPypi, boto3, cryptography }:
 
 buildPythonPackage rec {
   pname = "ec2instanceconnectcli";
···
     sha256 = "sha256-VaCyCnEhSx1I3bNo57p0IXf92+tO1tT7KSUXzO1IyIU=";
   };
 
-  propagatedBuildInputs = [ boto3 ];
+  propagatedBuildInputs = [ boto3 cryptography ];
 
   # has no tests
   doCheck = false;