Add support for new face helm-fd-finish
There is a new face for the new functionality for searching with fd, added here: https://github.com/emacs-helm/helm/commit/c11779cd11a1f62cd160ea9507641f8cc1a9d321
I just copied the definition from the other
helm-*-finish faces (a perhaps unnecessary proliferation of them in helm I would say).
This would probably be a TINYCHANGE, but I have also signed the FSF copyright assignment for Emacs.