lib: fix typo in util.js comment #2234

Job	Run time
Build slim tarball	1m 35s
aarch64-darwin: with shared libraries	33m 44s
x86_64-darwin: with shared libraries	42m 35s
aarch64-linux: with shared libraries	21m 53s
x86_64-linux: with shared libraries	28m 16s
	2h 8m 3s

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