Add ghc 9.6.5 #2131

Job	Run time
build-extra-hackages	31s
check-materialization-concurrency	31s
cabal	45s
cabal-doExactConfig	1m 9s
check-path-support	53s
closure-size	14s
docs	2m 5s
haskell-nix-roots-do-not-require-IFDs	11s
hix	1m 34s
hix-cabal	14m 2s
hydra-ifdLevel-0-and-1	1m 27s
hydra-ifdLevel-2	1m 4s
hydra-ifdLevel-3-and-ghc-9-2	57s
hydra-ifdLevel-3-and-ghc-8-10	51s
hydra-ifdLevel-3-and-not-ghc-8-10-or-9-2	57s
hydra-without-remote-builders	1m 3s
multi-target	39s
maintainer-scripts	23s
nix-build	2m 0s
nix-tools	1m 31s
plan-extra-hackages	27s
shellFor-hoogle	29s
runghc	34s
shellFor-multiple-package	43s
shellFor-not-depends	53s
shellFor-single-package	53s
tests-benchmarks	32s
update-docs	17s
unit-tests	24s
	37m 59s

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