Update CannotSubtractException.java

Author: maximevtush

money/src/main/java/com/iluwatar/CannotSubtractException.java

@@ -1,6 +1,6 @@
 package com.iluwatar;
 /**
- * An exception for when the user tries to subtract two diffrent currencies or subtract an amount he doesn't have.
+ * An exception for when the user tries to subtract two different currencies or subtract an amount he doesn't have.
  */
 public class CannotSubtractException extends Exception {
   /**
@@ -12,4 +12,4 @@ public CannotSubtractException(String message) {
     super(message);
   }
 
-}
+}