Span<T> used rather than ReadOnlySpan<T> used for low-level physics input.

A user has correctly reported that some of the new API calls use Span<T> where ReadOnlySpan<T> should be used.

https://discussions.unity.com/t/physicsshape-createshapebatch-in-low-level-physics2d-should-use-readonlyspan/1689547/3