mailmap: update mail for Fiona Behrens

Remove old mails of Fiona Behrens

Signed-off-by: Fiona Behrens <me@kloenk.dev>
Link: https://lore.kernel.org/r/20240922175729.233070-1-me@kloenk.dev


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>