mailmap: Update Luca Weiss's email address

I'm slowly migrating my mail to a new domain, add an entry to map the
mail address. Just for clarity, my work-related @fairphone.com email
stays unchanged.

Signed-off-by: Luca Weiss <luca@lucaweiss.eu>
Link: https://lore.kernel.org/r/20240628-mailmap-v1-1-a0d12ffd1cd9@lucaweiss.eu


Signed-off-by: Bjorn Andersson <andersson@kernel.org>