The tag we currently use no longer exists in the upstream repository, as
the history has ben "rewritten":
https://github.com/drowe67/codec2/issues/5
Bump to the latest (and only) tag in the new repository.
Release notes: https://github.com/drowe67/codec2/releases/tag/1.2.0
Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
[yann.morin.1998@free.fr: explain about missing tag]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>