The generated file was incorrectly named containerd.1 and should
be in section 8 (see [MAN-PAGES(7)]: Sections of the manual pages)
This patch fixes the filename and updates references to containerd(1)
to refer to containerd(8).
The generated file itself already had the correct section set in its
header, so didn't need updating.
[MAN-PAGES(7)]: http://man7.org/linux/man-pages/man7/man-pages.7.html
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
356782cb47