src: fix dead inspector help URL #5587

Job	Run time
Build slim tarball	2m 4s
aarch64-linux: with shared libraries	18m 23s
x86_64-linux: with shared libraries	22m 27s
x86_64-darwin: with shared libraries	31m 18s
aarch64-darwin: with shared libraries	20m 30s
	1h 34m 42s

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