Update nixpkgs pins #2603

Job	Run time
nix-build	27s
cabal	9s
cabal-doExactConfig	13s
runghc	11s
tests-benchmarks	11s
unit-tests	9s
build-extra-hackages	7s
check-path-support	6s
check-materialization-concurrency	19s
closure-size	8s
docs	19s
haskell-nix-roots-do-not-require-IFDs	8s
hix	15s
hix-cabal	6s
hydra-ifdLevel-0-and-1	2m 39s
hydra-ifdLevel-3	7m 39s
hydra-ifdLevel-2	2m 50s
hydra-without-remote-builders-ghc9101	10s
maintainer-scripts	8s
hydra-without-remote-builders-ghc8107	9s
multi-target	38s
nix-tools	11s
shellFor-multiple-package	12s
plan-extra-hackages	9s
shellFor-hoogle	9s
shellFor-not-depends	12s
shellFor-single-package	20s
update-docs	4s
	18m 18s

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