fixed composite in index.js

the word 'composite' was spelled wrong. Nothing major, just bugged me a little while going through the lesson :)

Author: AdityaGirdhar

3. Build a Blackjack game/23. Arrays with multiple data types/index.js

@@ -1,4 +1,4 @@
-// Array - ordered list of items - coposite / complex data type
+// Array - ordered list of items - composite / complex data type
 
 // Create an array that describes yourself. Use the three primitive data types you've learned
-// It should contain your name (string), your age (number), and whether you like pizza (boolean)
+// It should contain your name (string), your age (number), and whether you like pizza (boolean)