Trying to fix issue #1562

In Use Bracket Notation to Find the Nth to Last Character in a String:
There is a mistake in the code sample:

It should be: var thirdToLastLetterOfFirstName =
firstName[firstName.length - 3];
but is: var thirdToLastLetterOfFirstName = firstName[firstName.length -
2];

challenges/basic-javascript.json

@@ -259,7 +259,7 @@
       "challengeSeed": [
         "var firstName = \"Madeline\";",
         "",
-        "var thirdToLastLetterOfFirstName = firstName[firstName.length - 2];",
+        "var thirdToLastLetterOfFirstName = firstName[firstName.length - 3];",
         "",
         "var lastName = \"Chen\";",
         "",