Fix job updating snapshots when triggered by comment on first-time contributor PR #16872
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References
Fixes #16730
This should help with updating snapshots in #16866
Code changes
Allows the galata snapshot update job to run if the comment author is owner/member/collaborator (in addition to allowing to update snapshots if the PR author is owner/member/collaborator).
User-facing changes
None
Backwards-incompatible changes
None