devel/git-filter-repo: Update to the latest development branch

Point the upstream github hash that contains the 24+ commits that
fix the data loss issue, making PORTREVISION=1 of this port the
same as the -devel port.

I don't normally like to have a GA port point to a devel branch but
in this case backporting 24 commits leaves too much room for error.
These changes will be removed when upstream releases a new version.

Suggested by: diizzy
MFH: 2024Q4