chore: Update AI-generated response text for clarity (#12517)
- [x] Find the file containing "This is an AI-generated response"
- [x] Update the text to append ", posted by a human."
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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: anthonyshew <35677084+anthonyshew@users.noreply.github.com>
