Unable to download the vocabulary

I am trying to download the vocab file for the mentioned but I did not find the file.
Please find the link for more information - https://github.com/dice-group/gerbil/blob/master/src/main/resources/vocab/gerbil.ttl

Start with the referenced resource at src/main/resources/vocab/gerbil.ttl and compare it with the gerbil vocabulary URL in the issue. Verify how the vocabulary is exposed or linked, and consider the issue complete when the referenced vocabulary can be downloaded from a working public link.

Written by the indexing model from the issue text.