revert files in sprint 2 folder

Author: lintsang

Sprint-2/1-key-errors/0.js

@@ -10,4 +10,4 @@ function capitalise(str) {
 }
 
 // =============> write your explanation here
-// =============> write your new code here
+// =============> write your new code here

Sprint-2/1-key-errors/1.js

@@ -17,4 +17,4 @@ console.log(decimalNumber);
 // =============> write your explanation here
 
 // Finally, correct the code to fix the problem
-// =============> write your new code here
+// =============> write your new code here