Add missing declaration of parameter of function

src/withdrawMoney.h

@@ -3,4 +3,4 @@
 
 void withdraw(int user_id);
 float initiateWithdraw(float amountToWithdraw, float availableAccountBalance);
-void notifyCustomer(amountToWithdraw, remainingAccountBalance);
+void notifyCustomer(float amountToWithdraw, float remainingAccountBalance);