Fix Python typo

retriever.py

@@ -70,7 +70,7 @@ def load_crash_data():
             f"Arrest: {row.get('arrest_yes', 'N/A')}",
             f"Primary Vehicle: {row.get('veh1', 'N/A')}",
             f"Crash Type: {row.get('veh2', 'N/A')}",
-            f"Outcome: {row.get('investigat', 'N/A')}"
+            f"Outcome: {row.get('investigat', 'N/A')}",
             f"RecordID: {row.get('objectid', 'N/A')}"
         ])
         docs.append(Document(page_content=content, metadata={"id": row.get("id", "unknown")}))