chore: update wording in exception message

Author: xmatthias

freqtrade/exchange/exchange.py

@@ -3447,7 +3447,7 @@ def get_max_leverage(self, pair: str, stake_amount: float | None) -> float:
             #     else:  # if on the last tier
             if stake_amount > max_stake:
                 # If stake is > than max tradeable amount
-                raise InvalidOrderException(f"Amount {stake_amount} too high for {pair}")
+                raise InvalidOrderException(f"Stake amount {stake_amount} too high for {pair}")
 
             raise OperationalException(
                 f"Looped through all tiers without finding a max leverage for {pair}. "

tests/exchange/test_exchange.py

@@ -5931,7 +5931,7 @@ def test_get_max_leverage_futures(default_conf, mocker, leverage_tiers):
     assert exchange.get_max_leverage("SPONGE/USDT:USDT", 200) == 1.0  # Pair not in leverage_tiers
     assert exchange.get_max_leverage("BTC/USDT:USDT", 0.0) == 125.0  # No stake amount
     with pytest.raises(
-        InvalidOrderException, match=r"Amount 1000000000.01 too high for BTC/USDT:USDT"
+        InvalidOrderException, match=r"Stake amount 1000000000.01 too high for BTC/USDT:USDT"
     ):
         exchange.get_max_leverage("BTC/USDT:USDT", 1000000000.01)