fix(curriculum): update last question of working with strings in javascript lecture (freeCodeCamp#57939)

Author: lexlucid

curriculum/challenges/english/25-front-end-development/lecture-working-with-strings-in-javascript/673263e80dd43da7df3ae565.md

@@ -86,35 +86,35 @@ Remember, you can pass a second argument to the method to control where the sear
 
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-What type of function is `indexOf` in JavaScript?
+What type of method is `indexOf` in JavaScript?
 
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 A standalone function.
 
 ### --feedback--
 
-Methods are functions that belong to specific objects in JavaScript.
+Consider the type of object that deals with text in JavaScript.
 
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-A method of the `Array` object.
+A method of the `Date` object.
 
 ### --feedback--
 
-Methods are functions that belong to specific objects in JavaScript.
+Consider the type of object that deals with text in JavaScript.
 
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 A method of the `String` object.
 
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-A mathematical function.
+A method of the `Math` object.
 
 ### --feedback--
 
-Methods are functions that belong to specific objects in JavaScript.
+Consider the type of object that deals with text in JavaScript.
 
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