PR Description

This PR addresses an inconsistency in the Rust documentation regarding read_unaligned and write_unaligned on zero-sized types (ZSTs). The current documentation for pointer validity states that for zero-sized types (ZSTs), null pointers are valid:

For zero-sized types (ZSTs), every pointer is valid, including the null pointer.

However, there is an inconsistency in the documentation for the unaligned read operation in the function ptr::read_unaligned(as well as write_unaligned), which states:

Note that even if T has size 0, the pointer must be non-null.

This change is also supported by PR #134912

the _unaligned method docs should be fixed.