docs: link to examples is broken

[bertday]

Hello, team GeoArrow! Thank you for this awesome project 😄

This is minor, but I noticed the link to /examples in the Examples section of the docs is broken. Just wanted to leave a note. If I track it down in the source code, I'll try submitting a PR.

[kylebarron]

Thanks for the issue;

You can change this link to an absolute link instead of a relative link.