And repeat it every time rather than just on first install through
the README.gentoo so that (hopefully) upstream Valve will not get
more bug reports from here.
Furthermore note that we also can't really do much about issues
either and users seeking support should use normal Wine or normal
Proton.
Bug: https://bugs.gentoo.org/943001
Signed-off-by: Ionen Wolkens <ionen@gentoo.org>