Update seccomp KEP as implemented
Update seccomp KEP as implemented

The implementation is done for v1.19.0 and we now can mark this KEP as
`implemented`.

Signed-off-by: Sascha Grunert <70ab469ddb2ac3e35f32ed7c2fd1cca514b2e879@suse.com>

kubernetes/enhancements,kubernetes/enhancements,kubernetes/enhancements