Update main.py

main.py

@@ -69,7 +69,7 @@ async def get_stocks_data(ticker: str = Query(..., description="Enter your stock
     
 # Fetch Stock Chain
 @app.get('/chain', response_model=CHAIN, responses={200: {"description": "Successful response", "content": {"application/json": {"example": chain_response_example}}}})
-async def get_chain(ticker: str = Query(..., description="Enter your index name from [nifty, banknifty]",  example='nifty-bank')):
+async def get_chain(ticker: str = Query(..., description="Enter your index name from [nifty, banknifty]",  example='banknifty')):
     try:
         response, exp, index_ltp = fetcher.fetch_option_chain(ticker)
         response = response.to_dict(orient="records")