(post-v1?) Add chumsky to rust serialization benchmark page

[bew]

Around a corner of the internet I landed on:

Repo: https://github.com/djkoloski/rust_serialization_benchmark Website: https://david.kolo.ski/rust_serialization_benchmark/

And I was surprised to not see chumsky yet, and I think it should definitely be there somewhere!

[zesterer]

Interesting! I definitely think there would be value in this.