Fix SyntaxWarning for invalid escape sequence in llm.py

tinytroupe/utils/llm.py

@@ -721,7 +721,7 @@ class LLMChat:
 
     def _request_list_of_dict_llm_message(self):
             return {"role": "user",
-                    "content": "The `value` field you generate **must** be a list of dictionaries, specified as a JSON structure embedded in a string. For example, `[\{...\}, \{...\}, ...]`. This is critical for later processing."}
+                    "content": "The `value` field you generate **must** be a list of dictionaries, specified as a JSON structure embedded in a string. For example, `[{...}, {...}, ...]`. This is critical for later processing."}
 
     def _coerce_to_list(self, llm_output:str):
         """