Skip check generated for changes coming from dependabot

[fedepaol]

When a change comes from dependabot, it's likely to change the go.mod / go.sum files.
We should not run the checkgenerated CI when prs are coming from it, as we do in metallb.

[github-actions]

This issue has been automatically marked as stale because it has been open 30 days
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[tylerauerbeck]

Believe this was resolved by #111

[fedepaol]

Yep, thanks @tylerauerbeck !