New comment by Chocimier on void-packages repository

https://github.com/void-linux/void-packages/pull/27651#issuecomment-758281899

Comment:
Something like that maybe. 

    site="https://github.com/OpenPrinting/foomatic-db"
    version="${version:0:4}.${version:4:2}.${version:6:2}"
    pattern="relative-time datetime=\"\K\d{4}-\d{2}-\d{2}"

We usually use date of commit as version, but 2021 is fine here, to avoid going back.