Bump nixpkgs pins (#2354) #3100

Job	Run time
cabal	38s
cabal-doExactConfig	1m 3s
multi-target	2m 3s
nix-build	17m 29s
runghc	1m 4s
shellFor-single-package	2m 11s
tests-benchmarks	16s
unit-tests	8s
build-extra-hackages	1m 5s
closure-size	8s
docs	11m 54s
hix	1m 6s
hydra-ifdLevel-0-and-1	4m 48s
hydra-ifdLevel-2	11m 19s
hydra-ifdLevel-3	30m 14s
maintainer-scripts	8s
plan-extra-hackages	8s
shellFor-hoogle	27s
shellFor-multiple-package	24s
shellFor-not-depends	21s
update-docs	8s
check-materialization-concurrency	22s
check-path-support	13s
haskell-nix-roots-do-not-require-IFDs	26s
hix-cabal	15s
hydra-without-remote-builders-ghc9102	6m 39s
hydra-without-remote-builders-ghc967	3m 3s
nix-tools	15s
	1h 38m 15s

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