license: Add Frédéric to RELICENSE.md

I, Frédéric Danis, agree to relicense my contributions to NetworkManager
as LGPL-2.1+ as proposed by Thomas Haller.

Some of my work may be held under copyright by Sigfox or Collabora Ltd.
I do not speak for those entities.

Signed-off-by: Frédéric Danis <frederic.danis.oss@gmail.com>

https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/merge_requests/462

.mailmap

@@ -18,6 +18,7 @@ Fran Diéguez <frandieguez@gnome.org>
 Fran Diéguez <frandieguez@gnome.org> <fran.dieguez@mabishu.com>
 Francisco Javier F. Serrador <serrador@cvs.gnome.org> <serrador@openshine.com>
 Frédéric Danis <frederic.danis.oss@gmail.com> <frederic.danis.external@sigfox.com>
+Frédéric Danis <frederic.danis.oss@gmail.com> <frederic.danis@collabora.com>
 Gabor Kelemen <kelemeng@gnome.hu> <kelemeng@gnome.org>
 Gene Czarcinski <gene@czarc.net> <czar@acm.org>
 Giovanni Campagna <gcampagna@src.gnome.org> <scampa.giovanni@gmail.com>

RELICENSE.md

@@ -80,6 +80,7 @@ Consent/Disapproval List
 - [Y] Dan Williams <dcbw@redhat.com> (Red Hat, Inc.)
 - [Y] Dan Winship <danw@redhat.com> (Red Hat, Inc.)
 - [Y] Francesco Giudici <fgiudici@redhat.com> (Red Hat, Inc.)
+- [Y] Frédéric Danis <frederic.danis.oss@gmail.com> (Collabora Ltd, Sigfox)
 - [Y] Iñigo Martínez <inigomartinez@gmail.com>
 - [Y] Jan Alexander Steffens (heftig) <jan.steffens@gmail.com>
 - [Y] Jan Tojnar <jtojnar@gmail.com>