[Savonitar]

What is the purpose of the change

The Flink ML PR template lacks the AI-disclosure section described in the Flink contribution guide. Append the current Flink disclosure section while preserving the existing template content.

Addresses FLINK-40766, part of FLINK-40749.

Brief change log

• Append the AI-disclosure checkbox and visible Generated-by tool/version placeholder.
• Link the Flink contribution guide instead of an absent AGENTS.md.

Verifying this change

Verified that the original template is preserved byte-for-byte and only 21 lines are added. Checked the complete one-file diff, whitespace, and HTML comment boundaries; the AI checkbox and Generated-by placeholder remain visible outside comments. No Maven build or Java/Python tests were run for this Markdown-only change.

Does this pull request potentially affect one of the following parts:

• Dependencies (does it add or upgrade a dependency): no
• The public API, i.e., is any changed class annotated with @Public(Evolving): no

Documentation

• Does this pull request introduce a new feature? No.
• If yes, how is the feature documented? Not applicable.

---

Was generative AI tooling used to co-author this PR?

• Yes (please specify the tool below)

Generated-by: OpenAI Codex (GPT-6)