Updated tavily rm to have engine docs in first docs string

knowledge_storm/rm.py

@@ -692,7 +692,7 @@ def forward(
  return collected_results
 
 class TavilySearchRM(dspy.Retrieve):
- """Retrieve information from custom queries using Tavily."""
+ """Retrieve information from custom queries using Tavily. Documentation and examples can be found at https://docs.tavily.com/docs/python-sdk/tavily-search/examples"""
  def __init__(
  self,
  tavily_search_api_key=None,