chore(prompts): update Responder system prompt for better citations

Author: magurh

src/data/rag_answer.json

@@ -1,4 +1,4 @@
 {
     "query": "What is the block time for the Flare blockchain?",
-    "answer": "The Flare blockchain produces a block approximately every 1.8 seconds [Document 0].\n"
+    "answer": "The Flare blockchain generates a new block approximately every 1.8 seconds [Document 0-overview.mdx].\n"
 }

src/flare_ai_rag/responder/prompts.py

@@ -6,7 +6,7 @@
 
 Guidelines:
 - Use the provided context to support your answer. If applicable,
-include citations referring to the context (e.g., "[Document 1]" or "[Source A]").
+include citations referring to the context (e.g., "[Document <name>]" or "[Source <name>]").
 - Be clear, factual, and concise. Do not introduce any information that isn't
 explicitly supported by the context.
 - Maintain a professional tone and ensure that all technical details are accurate.