Fix typo

llm_service.py

@@ -75,7 +75,7 @@ class DefaultLLMService(LLMService):
     all_ids = df["ENCOUNTER_ID"].astype(str).tolist()
     existing_ids = collection.get(ids=all_ids)["ids"]
     new_df = df[~df["ENCOUNTER_ID"].isin(existing_ids)] #get rows not in collection
-    new_ids=new_df["ENCOUNTER_ID"].astype(str.tolist())
+    new_ids=new_df["ENCOUNTER_ID"].astype(str).tolist()
 
     # get data from new rows
     #TODO what other info should be vectorized