knative/pkg: bump to release-1.7.

[vdemeester]

Changes

This just make us depend on a "released" version of knative/pkg
instead of a commit on main.

Signed-off-by: Vincent Demeester vdemeest@redhat.com

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Release Notes

NONE

[vdemeester]

/kind misc

[imjasonh]

/lgtm

[abayer]

/approve

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