Update flake.nix #89

Job	Run time
nix	1m 0s
build (ubuntu-latest, holochain, hc, hc-run-local-services, hc-sandbox, hcterm)	54s
build (ubuntu-latest, lair-keystore)	27s
build (ubuntu-latest, hc-launch)	44s
build (ubuntu-latest, hc-scaffold)	19m 28s
build (macos-latest, holochain, hc, hc-run-local-services, hc-sandbox, hcterm)	1m 44s
build (macos-latest, lair-keystore)	1m 7s
build (macos-latest, hc-launch)	33m 47s
build (macos-latest, hc-scaffold)	1m 10s
build (macos-13, holochain, hc, hc-run-local-services, hc-sandbox, hcterm)	50m 17s
build (macos-13, lair-keystore)	13m 5s
build (macos-13, hc-launch)	50m 18s
build (macos-13, hc-scaffold)	50m 18s
	3h 44m 19s

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