feat(curriculum): Update JS data types lesson (#63168)

curriculum/challenges/english/blocks/lecture-introduction-to-javascript/672d496eca926b5df8176a67.md

@@ -21,11 +21,11 @@ The next data type is a `String`.
 
 A `String` is a sequence of characters, or text, enclosed in quotes. Here are two examples:
 
-```js
+```md
 "Hello, world"
 ```
 
-```js
+```md
 'JavaScript'
 ```
 
@@ -58,24 +58,19 @@ The last two data types are the `Symbol` and `BigInt` data types.
 A `Symbol` is a special type of value in JavaScript that is always unique and cannot be changed. It's often used to create unique labels or identifiers for properties:
 
 ```js
-// Creating two symbols
-const symbol1 = Symbol('mySymbol');
-const symbol2 = Symbol('mySymbol');
-console.log(symbol1 === symbol2); // Outputs: false
+Symbol('mySymbol');
 ```
 
-In this example, we create two symbols with the same description, but they are unique.
-
 `BigInt` is used for very large numbers that exceed the limit of the `Number` type:
 
 ```js
-const bigNumber = 1234567890123456789012345678901234567890n;
-console.log(bigNumber);
-// Outputs: 1234567890123456789012345678901234567890n
+1234567890123456789012345678901234567890n;
 ```
 
 In this example, we create a `BigInt` by adding `n` at the end of a very large number.
 
+`Symbol` and `BigInt` are two types that are less commonly used, but they are still important to know about.
+
 Understanding these data types helps you handle and work with various kinds of data in your programs, as each type has its own characteristics and behaviors.
 
 # --questions--