Add upper bound on iserv-proxy:network (#2429) #3323

Job	Run time
cabal	47s
nix-build	2m 59s
closure-size	8s
runghc	41s
unit-tests	22s
maintainer-scripts	10s
tests-benchmarks	1m 2s
shellFor-multiple-package	1m 2s
hix	3m 53s
build-extra-hackages	20s
cabal-doExactConfig	14s
hydra-ifdLevel-0-and-1	5m 48s
multi-target	4m 8s
hydra-ifdLevel-2	14m 16s
shellFor-not-depends	32s
shellFor-single-package	24s
shellFor-hoogle	26s
docs	1m 14s
hydra-ifdLevel-3	30m 18s
hydra-without-remote-builders-ghc967	5m 53s
plan-extra-hackages	11s
hydra-without-remote-builders-ghc9102	4m 4s
check-nix-tools	16s
hix-cabal	18s
update-docs	12s
check-path-support	21s
check-materialization-concurrency	23s
haskell-nix-roots-do-not-require-IFDs	28s
	1h 20m 50s

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