tests.evalNixpkgs: Update the golden hash

`nix-env -qaP`'s output has changed a bit because of https://github.com/NixOS/nix/issues/10132.

Although that's a bit annoying, it isn't nearly as problematic as the
evaluation changes that this test is supposed to catch. So it's find to
just update the hash for the time being and fix the issue later
(properly fixing the issue will very likely change the hash any way).

flake.nix

@@ -302,7 +302,7 @@
                 (
                   set -x
                   time nix-env --store dummy:// -f ${nixpkgs-regression} -qaP --drv-path | sort | grep -v nixos-install-tools > packages
-                  [[ $(sha1sum < packages | cut -c1-40) = ff451c521e61e4fe72bdbe2d0ca5d1809affa733 ]]
+                  [[ $(sha1sum < packages | cut -c1-40) = e01b031fc9785a572a38be6bc473957e3b6faad7 ]]
                 )
                 mkdir $out
               '';