Fix typo on OOP challenge (#18616)

* Fix type on OOP as requested on issue #18091

fix: 
numLegs: 2 to numLegs: 4 

on challenge:
 Remember to Set the Constructor Property when Changing the Prototype

* Update remember-to-set-the-constructor-property-when-changing-the-prototype.english.md

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/remember-to-set-the-constructor-property-when-changing-the-prototype.english.md

@@ -42,7 +42,7 @@ function Dog(name) {
 // Modify the code below this line
 Dog.prototype = {
 
-  numLegs: 2,
+  numLegs: 4,
   eat: function() {
     console.log("nom nom nom");
   },
@@ -68,7 +68,7 @@ function Dog(name) {
 }
 Dog.prototype = {
   constructor: Dog,
-  numLegs: 2,
+  numLegs: 4,
   eat: function() {
     console.log("nom nom nom");
   },