message: Change `Github` to `GitHub`
  That's how it's officially spelled.
diff: <p>
  The source code of Docs.rs is available on
  - <a href="https://github.com/onur/docs.rs" target="_blank">Github</a>. If
  + <a href="https://github.com/onur/docs.rs" target="_blank">GitHub</a>. If
  you ever encounter an issue, don't hesitate to report it! (And
  thanks in advance!)
  </p>
  