fix: download button pointing to an incorrect binary on Windows arm64 (#7240)

* Fix Download button pointing to an incorrect binary on Windows arm64

Closes #7239 

This PR changes the way DownloadButton calculates `bitness` which gets passed to `getNodeDownloadUrl`. 

Previously, this value was passed directly from `useDetectOS()` without any further processing, leading to the issue mentioned above.

After this change, `bitness` is calculated similarly to how it's done in `BitnessDropdown`, so: by passing `architecture` and `bitness` to `getUserBitnessByArchitecture`:

https://github.com/nodejs/nodejs.org/blob/c5345f551ea545cf9d04017204b17f3099940ada/apps/site/components/Downloads/Release/BitnessDropdown.tsx#L16-L29

Signed-off-by: Wojciech Maj <[email protected]>

* Fix formatting

---------

Signed-off-by: Wojciech Maj <[email protected]>

Author: wojtekmaj

apps/site/components/Downloads/DownloadButton/index.tsx

@@ -8,6 +8,7 @@ import Button from '@/components/Common/Button';
 import { useDetectOS } from '@/hooks';
 import type { NodeRelease } from '@/types';
 import { getNodeDownloadUrl } from '@/util/getNodeDownloadUrl';
+import { getUserBitnessByArchitecture } from '@/util/getUserBitnessByArchitecture';
 
 import styles from './index.module.css';
 
@@ -17,7 +18,12 @@ const DownloadButton: FC<PropsWithChildren<DownloadButtonProps>> = ({
   release: { versionWithPrefix },
   children,
 }) => {
-  const { os, bitness } = useDetectOS();
+  const {
+    os,
+    bitness: userBitness,
+    architecture: userArchitecture,
+  } = useDetectOS();
+  const bitness = getUserBitnessByArchitecture(userArchitecture, userBitness);
   const downloadLink = getNodeDownloadUrl(versionWithPrefix, os, bitness);
 
   return (