Change prompt to try and get only topic names

[abhinavg4]

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Description

Tries to fix #533. LLM gives output topics with descriptions. When we try to create a YAML, those descriptions sometimes get treated as separate topics. We modify the prompt to ask the LLM to just give the topic list.

Usage

# Add snippet demonstrating usage

Checklist

• [ ] I am familiar with the Contributing Guide.
• [ ] New or Existing tests cover these changes.
• [ ] The documentation is up to date with these changes.