Add LREC + Automatically sync

[AmitMY]

The LREC Sign Language workshop has this website -
https://www.sign-lang.uni-hamburg.de/lrec/index.html

Which links to two bib files:
without abstracts: https://www.sign-lang.uni-hamburg.de/lrec/sign-lang_lrec.bib
with abstracts: https://www.sign-lang.uni-hamburg.de/lrec/sign-lang_lrec_a.bib

While one can add them manually to this repo, I was wondering if there is a setting somewhere to just put this link, and whenever someone runs an "update" script it will re-fetch the bib file and process it?