4.5u stabilizer is incorrect

I noticed that 4.5u space stabilizer is drawn the same size as 3u. It doesn't seem to be correct. I once took it as 34.671mm from the center from https://web.archive.org/web/20240202070508/https://deskthority.net/wiki/Space_bar_dimensions#4.5_units_.2885mm_wide.2C_3_mounts.2C_34.671mm_apart.29 This website is down atm, thus webarchive link.

Then, it seems it was standardized as 35mm +-0.2mm: https://green-keys.info/en/japan-layout-alliance/#Technical-Drawings

Please, adjust the code according to the JLA-450. It'll be also nice if it supports 4.25u spacebar properly as well.

the fix could be like this
```ts
// file src/utils/plate/plate-dimensions.ts

export function getCherryMxStabilizerSpacing(keySize: number): number | null {
if (keySize >= 8) return 66.675
if (keySize >= 7) return 57.15
if (keySize >= 6.25) return 50
if (keySize >= 6) return 47.625
if (keySize >= 4.5) return 35
if (keySize >= 4.25) return 30
if (keySize >= 3) return 19.05
if (keySize >= 2) return 11.938
return null
}
```