docs: ask for AI disclosure on comments too (#3459)

Author: maxisbey

CONTRIBUTING.md

@@ -34,7 +34,7 @@ Whether to assign an issue, and to whom, is a [maintainer](https://github.com/mo
 
 We use AI tooling constantly and have no problem with you using it too. What matters is that a person is accountable for the result:
 
-- **Disclose it.** One line in the PR or issue description.
+- **Disclose it.** One line in the PR description, issue, or comment.
 - **Own it.** You can explain the change and the reasoning in your own words, and when a maintainer asks a question the answer comes from you rather than being pasted from a chat window.
 - **Keep a human in the loop.** Issues, PRs, and comments generated by an agent without a person who has actually hit the problem and read the output may be closed without warning. If you have an agent filing PRs against open issues autonomously, please turn it off for this repository.
 - **Keep issues short and factual.** What happened, what you expected, and how to reproduce it.