Code comment points to dead link

[MikeZappa87]

This line points to a dead link.

go-cni/namespace_opts.go

Line 37 in 2d9d28f

// https://github.com/heptio/cni-plugins/tree/master/plugins/meta/bandwidth

New Link:
https://github.com/containernetworking/plugins/tree/master/plugins/meta/bandwidth