Thought this might be useful to point people at the API docs (after I
tried searching for pprof API docs and couldn't find them easily on
Google).

Points at https://pkg.go.dev/github.com/google/pprof/profile, as that's
the only package we try to declare as an API.

Badge generated at
https://pkg.go.dev/badge/?path=https%3A%2F%2Fpkg.go.dev%2Fgithub.com%2Fgoogle%2Fpprof%2Fprofile