workflows: check autogenerated files when commands change

[kmarekspartz]

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• Have you followed our Contributing guidelines?
• Have you checked for other open Pull Requests for the same change?
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[p-linnane]

This is already covered by https://github.com/Homebrew/brew/blob/main/.github/workflows/sponsors-maintainers-man-completions.yml.

[MikeMcQuaid]

@p-linnane That'll do it automatically but I think it's worth considering having at least a 🔴 warning to encourage users to do it for us.

[kmarekspartz]

I feel neutral about either path. I made this based on feedback I received on a different PR: #23152 (review)

[kmarekspartz]

Moving this out of draft as my other PR was merged.

[MikeMcQuaid]

Thanks. Let's try this and see if it gets annoying.