repo-gardening: Update AI prompt for labelling

[inaikem]

Following further tests, I updated the OpenAI prompt to ensure the 'Product,' 'Platform', and 'Type' labels are added.

Fixes #

Proposed changes:

Other information:

• Have you written new tests for your changes, if applicable?
• Have you checked the E2E test CI results, and verified that your changes do not break them?
• Have you tested your changes on WordPress.com, if applicable (if so, you'll see a generated comment below with a script to run)?

Jetpack product discussion

Does this pull request change what data or activity we track or use?

Testing instructions:

• Go to '..'

[github-actions]

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[inaikem]

@anomiex 👋 This is my first time submitting a PR, and any help/guidance is appreciated. This change updates only the prompt used to generate issue labels.

[anomiex]

Since you asked for feedback 🙂 regarding the formatting of the PR itself,

• I adjusted the title for you to be more descriptive.
• You should fill in the template in the description. What you added at the top is decent for the "Proposed changes" section, but "Testing instructions" would be helpful.

You'll need to add a change entry. If you haven't done a pnpm install in your local copy of the monorepo yet, do that. Then you should be able to run pnpm jetpack changelog add to generate one.

As for the PR itself, I'm not terribly familiar with LLM prompt engineering but I left a bunch of inline comments about stuff that would confuse me if trying to follow the instructions. 😅

[anomiex]

Is the AI supposed to ignore this line because it looks like a comment?

[anomiex]

This seems like it will confuse the AI, since no "Product" labels are included in the list above and the AI was instructed to only use labels from the list above.

[anomiex]

Same here, neither "Platform" nor "Type" are included in the list above.

[anomiex]

Also, I wonder whether the AI will have any clue about what either of the platforms are and when they might apply.

[anomiex]

This changed instruction does not match the example response format below.

[anomiex]

More comments the AI is supposed to figure out to ignore?