Bump nixpkgs pins #3084

Job	Run time
nix-build	55s
runghc	52s
cabal	11s
cabal-doExactConfig	54s
multi-target	1m 22s
shellFor-single-package	1m 11s
tests-benchmarks	9s
unit-tests	5s
build-extra-hackages	10s
hix	43s
maintainer-scripts	8s
plan-extra-hackages	6s
shellFor-hoogle	13s
shellFor-multiple-package	19s
shellFor-not-depends	21s
check-materialization-concurrency	23s
closure-size	3s
docs	12m 56s
hydra-ifdLevel-0-and-1	9s
hydra-ifdLevel-2	9s
hydra-ifdLevel-3	9s
update-docs	4s
check-path-support	22s
haskell-nix-roots-do-not-require-IFDs	14s
hix-cabal	8s
hydra-without-remote-builders-ghc9102	11s
hydra-without-remote-builders-ghc967	2m 57s
nix-tools	5m 11s
	30m 35s

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