Type-check fails on valid statement (Vector multiplied by Number)

Type-check warning:
> TypeError: Type 'number' could not be converted into 'quaternion | vector'; none of the union options are compatible Luau([1000](https://luau-lang.org/typecheck))

Test case:
```lua
local a = vector(1,2,3) * 2
```

Despite the warning, it will still compile and execute as expected in Second Life.