Bump wharfie to v0.6.7

[brandond]

Fixes issue where rewrites were incorrectly applied to the default registry endpoint, which broke fallback to the upstream registry when an image was not available from the mirror.

This was resolved in the containerd config generated by RKE2 and K3s a while back, but had not yet been addressed in wharfie.

• • https://github.com/rancher/wharfie/issues/25#issuecomment-2289099654

[jakefhyde]

@brandond Sorry, you mind rebasing?

[HarrisonWAffel]

Closing in favor of #200