Fix link

[mgifford]

The GitHub link in the top right of this page https://dataviz.boavizta.org

Goes to https://github.com/Boavizta/boavizta-front

Rather than https://github.com/Boavizta/

Seeing this:
WARNING : THIS REPO HAS BEEN MOVED TO DATAVIZTA

Isn't a great user experience.