fix(curriculum): updated ES5 and ES6 class description (#47935)

* fix(curriculum): updated ES5 and ES6 class description

* fix: es5 example removed

* Update curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-class-syntax-to-define-a-constructor-function.md

Co-authored-by: Jeremy L Thompson <jeremy@jeremylt.org>

* Update curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-class-syntax-to-define-a-constructor-function.md

Co-authored-by: Jeremy L Thompson <jeremy@jeremylt.org>

* Update curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-class-syntax-to-define-a-constructor-function.md

Co-authored-by: Jeremy L Thompson <jeremy@jeremylt.org>

* Update curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-class-syntax-to-define-a-constructor-function.md

Co-authored-by: Jeremy L Thompson <jeremy@jeremylt.org>

* Update curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-class-syntax-to-define-a-constructor-function.md

Co-authored-by: Sem Bauke <semboot699@gmail.com>

Co-authored-by: Jeremy L Thompson <jeremy@jeremylt.org>
Co-authored-by: Sem Bauke <semboot699@gmail.com>
Co-authored-by: Tom <20648924+moT01@users.noreply.github.com>

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-class-syntax-to-define-a-constructor-function.md

@@ -12,24 +12,35 @@ ES6 provides a new syntax to create objects, using the <dfn>class</dfn> keyword.
 
 It should be noted that the `class` syntax is just syntax, and not a full-fledged class-based implementation of an object-oriented paradigm, unlike in languages such as Java, Python, Ruby, etc.
 
-In ES5, we usually define a `constructor` function and use the `new` keyword to instantiate an object.
-
-```js
-var SpaceShuttle = function(targetPlanet){
-  this.targetPlanet = targetPlanet;
-}
-var zeus = new SpaceShuttle('Jupiter');
-```
-
-The `class` syntax simply replaces the `constructor` function creation:
+In ES5, an object can be created by defining a `constructor` function and using the `new` keyword to instantiate the object.
+
+In ES6, a `class` declaration has a `constructor` method that is invoked with the `new` keyword. If the `constructor` method is not explicitly defined, then it is implicitly defined with no arguments.
 
 ```js
+// Explicit constructor
 class SpaceShuttle {
   constructor(targetPlanet) {
     this.targetPlanet = targetPlanet;
   }
+  takeOff() {
+    console.log("To " + this.targetPlanet + "!");
+  }
 }
+
+// Implicit constructor 
+class Rocket {
+  launch() {
+    console.log("To the moon!");
+  }
+}
+
 const zeus = new SpaceShuttle('Jupiter');
+// prints To Jupiter! in console
+zeus.takeOff();
+
+const atlas = new Rocket();
+// prints To the moon! in console
+atlas.launch();
 ```
 
 It should be noted that the `class` keyword declares a new function, to which a constructor is added. This constructor is invoked when `new` is called to create a new object.