Minor CSS UI bug on the Goose home page.

To Reproduce
Steps to reproduce the behavior:

1. go to https://block.github.io/goose/
2. Reduce the browser width until you see the navigation start to overlap.

Expected behavior
Don't let navigation elements overlap.

Screenshots

Please provide following information:
Chrome osx

Additional context
it happens to the best of us.