k3s: upgrade to v1.33.13

Change-Id: I95f19a5c0cd11f5dd316191cd93424c1b91ab376
diff --git a/flake.nix b/flake.nix
index dcd2fbf..0d89f4e 100644
--- a/flake.nix
+++ b/flake.nix
@@ -34,6 +34,8 @@
             kubectl
             fluxcd
             pkgs.k9s
+            pkgs.k3sup
+            pkgs.git
             alias-kubectl
           ];
         };