Small doc correction for Rust LM_FindSymbolAddress

[MolotovCherry]

On the rust docs for LM_FindSymbolAddress, for the name param it states:

name: C string containing the name of the symbol

But strictly speaking, the c string is already handled internally, and passing a normal rust string is OK. This param description is OK on LM_SymbolAddressDemangled

[rdbo]

Since the Rust bindings are being rework on, the current docs will probably get deprecated I'm putting brief documentation using /// on top of the methods to make up for it, and also will be easier to access from the code editor/IDE