Now that we have moved to Meson, we are no longer required to
use a specific name for this file, and since the rest of our
documentation is in reStructuredText format and uses a matching
file extension, we can give the AUTHORS file the same treatment.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>