Clarified that vectors must be finite to be normalized. #1347

Job	Run time
Lint	2m 34s
Test (ubuntu-latest, stable)	2m 40s
Test (ubuntu-latest, beta)	2m 40s
Check MSRV (ubuntu-latest, 1.68.2)	1m 26s
Test portable simd (ubuntu-latest, nightly)	46s
Test (ubuntu-latest, nightly)	2m 30s
Check MSRV (macos-latest, 1.68.2)	1m 23s
Test wasm (stable, ubuntu-latest)	4m 22s
Test portable simd (macos-latest, nightly)	47s
Test (macos-latest, stable)	3m 28s
Check MSRV (windows-latest, 1.68.2)	1m 52s
Test (macos-latest, beta)	2m 14s
Test portable simd (windows-latest, nightly)	1m 25s
Test (macos-latest, nightly)	2m 20s
Test (windows-latest, stable)	4m 30s
Test (windows-latest, beta)	4m 37s
Test (windows-latest, nightly)	4m 42s
	44m 16s

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