Content Classification: Improve relevance of taxonomy suggestions

What problem does this address?

As reported by Miriam Schwab (Elementor):

Category and tag suggestions work and can be useful, but the suggestions are often not relevant at all to the post.

From the GDoc

@/dkotter : almost certainly some adjustments we can make here, noting this is one of our newest experiments and this is likely the first bit of feedback we've gotten

What is your proposed solution?

We should audit the prompt and explore if there's already ways to improve it.

Using this issue to capture other feedback as it comes in.