message: Fixed links of wasmer runtime C api in crates.io and docs.rs
diff: <a href="https://spectrum.chat/wasmer">
  <img src="https://withspectrum.github.io/badge/badge.svg" alt="Join the Wasmer Community">
  </a>
  - <a href="https://crates.io/crates/wasm-bindgen">
  + <a href="https://crates.io/crates/wasmer-runtime-c-api">
  <img src="https://img.shields.io/crates/d/wasmer-runtime-c-api.svg" alt="Number of downloads from crates.io">
  </a>
  - <a href="https://docs.rs/wasm-bindgen">
  + <a href="https://docs.rs/wasmer-runtime-c-api">
  <img src="https://docs.rs/wasmer-runtime-c-api/badge.svg" alt="Read our API documentation">
  </a>
  </p>
  