Incorrect download suggested on Windows arm64 machines

### URL:

https://nodejs.org/en

### Browser Name:

Edge

### Browser Version:

131.0.2903.51

### Operating System:

Windows 11, 24H2, 26100.2314

### How to reproduce the issue:

1. Open nodejs.org on Windows arm64 machine (e.g. Surface Laptop, 7th edition)
2. Click Download
3. At the moment of writing, `node-v22.11.0-x64.msi` gets downloaded.

Interestingly, https://nodejs.org/en/download/prebuilt-installer correctly recognizes my machine ARM64 and this particular download button works as expected. This button, however, receives `bitness` as `arm64` (as opposed to just `64`), from `ReleaseContext`, which in turn appears to be fed with correct value by `BitnessDropdown` right here:

https://github.com/nodejs/nodejs.org/blob/c5345f551ea545cf9d04017204b17f3099940ada/apps/site/components/Downloads/Release/BitnessDropdown.tsx#L16-L29


	const BitnessDropdown: FC = () => {
	const { bitness: userBitness, architecture: userArchitecture } =
	useDetectOS();
	const { bitness, os, release, setBitness } = useContext(ReleaseContext);
	const t = useTranslations();

	// we also reset the bitness when the OS changes, because different OSs have
	// different bitnesses available

	useEffect(() => {
	setBitness(getUserBitnessByArchitecture(userArchitecture, userBitness));
	// we shouldn't update the effect on setter state change
	// eslint-disable-next-line react-hooks/exhaustive-deps
	}, [userArchitecture, userBitness]);

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Incorrect download suggested on Windows arm64 machines #7239

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