pwnies is an XaaS (XSS as a Service). To get pwnies to appear in your Rust documentation, simply put:
[package.metadata.docs.rs]
rustdoc-args = ["--html-in-header", ".cargo/registry/src/github.com-1ecc6299db9ec823/pwnies-0.0.13/pwnies.html"]
in your crate's Cargo.toml.