Advisory-feeder fails due to renamed advisory

Advisory feeder is failing with the following error: ERR Could not process /tmp/gitlab_advisory_db/gem/brbackup/OSDDB-108899.yml error="open /tmp/gitlab_advisory_db/gem/brbackup/OSDDB-108899.yml: no such file or directory".

This is one of the files that we renamed in GemnasiumDB in this MR.

Relevant slack thread: https://gitlab.slack.com/archives/C041QBA1N9G/p1687428057426769