* The URL variables link returned a 404

Im not quite sure if what i put down is the right syntax - but im trying to help and get that link updated to 
https://grafana.com/docs/grafana/latest/variables/url-variables/

* Update docs/sources/linking/data-links.md

Co-authored-by: Diana Payton <52059945+oddlittlebird@users.noreply.github.com>

Co-authored-by: Diana Payton <52059945+oddlittlebird@users.noreply.github.com>