refactoring: corrected text in number size check

src/inputHandler.c

@@ -53,6 +53,6 @@ int isOperationIdValid(int id) {
 
 int isNumberTooBig(int number) {
     if(number < 200) return 0;
-    printf("Diese Nummer ist zu groß");
+    printf("This number is too big. Please choose a smaller one...\n");
     return 1;
 }