Remove color flag since it fails on busybox

[found-it]

Failing with a red herring error here

Looks like busybox's diff does not have --color so it fails whenever yam tries to spit out a diff.

[developer-guy]

same error here: https://github.com/chainguard-dev/enterprise-packages/actions/runs/4985121299/jobs/8924353443?pr=192

[luhring]

ahh good catch @developer-guy, we need to bump yam within wolfictl. I can take that!

[developer-guy]

Approved!