Revert "Update example/flake.lock" #1163

Job	Run time
configure	3s
nix (x86_64-linux, dev)	6s
nix (x86_64-linux, doc)	20s
nix (x86_64-linux, example)	6s
nix (x86_64-linux, haskell-parsers-test)	3s
nix (x86_64-linux, test-otherOverlays)	18s
nix (x86_64-linux, test-project-module)	19s
nix (x86_64-linux, test-settings-defaults)	22s
nix (x86_64-linux, test-simple)	19s
nix (x86_64-linux, test-with-subdir)	21s
nix (x86_64-darwin, dev)	35s
nix (x86_64-darwin, doc)	1m 4s
nix (x86_64-darwin, example)	34s
nix (x86_64-darwin, haskell-parsers-test)	12s
nix (x86_64-darwin, test-otherOverlays)	2m 48s
nix (x86_64-darwin, test-project-module)	2m 54s
nix (x86_64-darwin, test-settings-defaults)	2m 54s
nix (x86_64-darwin, test-simple)	2m 49s
nix (x86_64-darwin, test-with-subdir)	2m 49s
nix (aarch64-darwin, dev)	17s
nix (aarch64-darwin, doc)	53s
nix (aarch64-darwin, example)	21s
nix (aarch64-darwin, haskell-parsers-test)	11s
nix (aarch64-darwin, test-otherOverlays)	3m 6s
nix (aarch64-darwin, test-project-module)	3m 5s
nix (aarch64-darwin, test-settings-defaults)	2m 52s
nix (aarch64-darwin, test-simple)	2m 35s
nix (aarch64-darwin, test-with-subdir)	2m 29s
	34m 45s

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