fix: add stop_price_prop for hyperliquid

temporary workaround for #10960

freqtrade/exchange/hyperliquid.py

@@ -31,6 +31,7 @@ class Hyperliquid(Exchange):
     _ft_has_futures: FtHas = {
         "stoploss_on_exchange": True,
         "stoploss_order_types": {"limit": "limit"},
+        "stop_price_prop": "stopPrice",
         "funding_fee_timeframe": "1h",
         "funding_fee_candle_limit": 500,
     }