Traduction de library/decimal.po (python#1660)

Co-authored-by: Julien Palard <julien@palard.fr>
Co-authored-by: Vincent Poulailleau <vpoulailleau@gmail.com>
Co-authored-by: Mathieu Dupuy <deronnax@gmail.com>
Co-authored-by: Mathieu Dupuy <mathieu.dupuy@critizr.com>
Co-authored-by: Jean Abou Samra <jean@abou-samra.fr>

Merci à tous.

Author: nils-van-zuijlen