k0: bump to 1.16.5

Change-Id: I548808ce4e0deb0513a1e00963f383d84b9d920c
diff --git a/cluster/nix/modules/kubernetes.nix b/cluster/nix/modules/kubernetes.nix
index b36e806..92e28de 100644
--- a/cluster/nix/modules/kubernetes.nix
+++ b/cluster/nix/modules/kubernetes.nix
@@ -4,17 +4,17 @@
 let
   # Pin for k8s packages. This is so that upagrading the system will not upgrade the k8s control or data planes.
   k8spkgs = import (fetchGit {
-    # Now at 1.15.4
-    name = "nixos-unstable-2019-09-18";
+    # Now at 1.16.5
+    name = "nixos-unstable-2020-01-22";
     url = https://github.com/nixos/nixpkgs-channels/;
-    rev = "b21a3356f01b59992432a907f17e66abc77f17a0";
+    rev = "a96ed5d70427bdc2fbb9e805784e1b9621157a98";
   }) {};
   # Pin for kubelet
   k8spkgsKubelet = import (fetchGit {
-    # Now at 1.15.4
-    name = "nixos-unstable-2019-09-18";
+    # Now at 1.16.5
+    name = "nixos-unstable-2020-01-22";
     url = https://github.com/nixos/nixpkgs-channels/;
-    rev = "b21a3356f01b59992432a907f17e66abc77f17a0";
+    rev = "a96ed5d70427bdc2fbb9e805784e1b9621157a98";
   }) {};
 
 in rec {