Use correct Return hint

freqtrade/rpc/rpc.py

@@ -186,7 +186,7 @@ class RPC:
 
     def _rpc_daily_profit(
             self, timescale: int,
-            stake_currency: str, fiat_display_currency: str) -> List[List[Any]]:
+            stake_currency: str, fiat_display_currency: str) -> Dict[str, Any]:
         today = datetime.utcnow().date()
         profit_days: Dict[date, Dict] = {}