chore: Refine prompt for extracting key actions from planning policy bullet points

planning_ai/chains/prompts/policy.txt

@@ -1,4 +1,10 @@
-The following is a list of bullet points relating to a particular planning policy. Rewrite the bullet points to focus only on the key action or idea, excluding additional context (like the name of the policy). If multiple bullet points share the same concept, combine them together. If any bullet points do not relate with the policy, exclude them. If any bullet points are generic, and simply restart the policy, exclude them.
+You are tasked with refining a list of bullet points related to a specific planning policy. Your goal is to:
+
+1. Extract and emphasize the core action or idea from each bullet point.
+2. Remove any additional context, such as the policy name or other non-essential details.
+3. Combine bullet points that convey the same concept into a single, concise point.
+4. Exclude any bullet points that are irrelevant to the policy.
+5. Disregard generic bullet points that merely restate the policy.
 
 Policy: {policy}