Fix broken README links

[TheButlah]

BTW, we are heavily using safer_ffi in company's codebase, which is now FOSS. Not linking it here to avoid self-promotion, but hopefully I can contribute upstream to safer_ffi if time allows! Especially interested in the potential for auto-generating C# FFI :)

[danielhenrymantilla]

Good catch, thanks!

• Regarding your own FOSS project, I'm very pleased to hear safer-ffi is being useful for it, and don't worry about "advertising it" here!
  • Aside / heads-up: with the inminent 0.1.0 release I'll be changing a bunch of item paths in the Rust crate, to hopefully yield nicer ergonomics. I may try to release a "migration version" with the current items deprecated and the new ones already there, if it doesn't end up too annoying to write. So if you are a big user of "latest" safer-ffi, this may be a thing to keep in consideration. I'll remain open to feedback to avoid disruption, of course