This makes the build pipeline run on stock NixOS 23.11 (which
our build server, saxtons, runs).

Update haskell version used by LeaseReport.

See merge request !1

with nixpkgs@353333ef340952c05332e3c271dff953264cb017
 and haskell.nix@949b2dffa816a758c1e9a3db3aa49d1a0c06968b:

  stack-to-nix -o nix