MRG: fix comment in _set_num_scaled (#3451) #6177

Job	Run time
Check	23s
Check if cbindgen runs cleanly for generating the C headers	8m 5s
coverage	9m 10s
Lints (beta)	33s
Lints (stable)	27s
Publish (on tags, dry-run otherwise)	5m 39s
minimum_rust_version	6m 49s
test (beta)	1m 35s
test_all_features	12m 31s
Run tests under wasm32-wasi	1m 14s
Check if wasm-pack builds a valid package for the sourmash crate	1m 27s
test (stable)	1m 18s
test (windows)	3m 15s
test (macos)	1m 14s
	53m 40s

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