nix: Update nixpkgs to get updated docker-compose

Without this docker-compose complains about depends_on config settings:

> ERROR: The Compose file './docker-compose.yml' is invalid because:
> services.tink-server.depends_on.generate-tls-certs.condition contains "service_completed_successfully", which is an invalid type, it should be a service_started, or a service_healthy
> services.web-assets-server.depends_on.fetch-and-convert-ubuntu-img.condition contains "service_completed_successfully", which is an invalid type, it should be a service_started, or a service_healthy
> services.registry.depends_on.generate-tls-certs.condition contains "service_completed_successfully", which is an invalid type, it should be a service_started, or a service_healthy

This was due to docker/compose#8154.

Signed-off-by: Manuel Mendez <github@i.m.mmlb.dev>

shell.nix

@@ -2,9 +2,9 @@ let _pkgs = import <nixpkgs> { };
 in { pkgs ? import (_pkgs.fetchFromGitHub {
   owner = "NixOS";
   repo = "nixpkgs";
-  #branch@date: master@2021-03-18
-  rev = "800a3dd90970a277e3f6853633bd7faf04d6691e";
-  sha256 = "07gzvf3m3vh9kkig2x9iybv8yr04kvmrx665z0fb0n5h55ha4v8y";
+  #branch@date: master@2022-06-02
+  rev = "17e891b141ca8e599ebf6443d0870a67dd98f94f";
+  sha256 = "0qiyl04s4q0b3dhvyryz10hfdqhb2c7hk2lqn5llsb8lxsqj07l9";
 }) { } }:
 
 with pkgs;