fix(curriculum): typo in step 2 of Building a Gradebook App (freeCodeCamp#55796)

Author: EhsanSl

curriculum/challenges/english/15-javascript-algorithms-and-data-structures-22/review-js-fundamentals-by-building-a-gradebook-app/6626a060c4006f793e10cb33.md

@@ -25,7 +25,7 @@ Here are the scores and their corresponding letter grades:
 
 **Tips**
 
-- Remember that you learned about conditional statements(`if`, `else if`, and `else`).
+- Remember that you learned about conditional statements (`if`, `else if`, and `else`).
 - Remember that you learned about comparison operators (`>`, `<`, `>=`, `<=`, `===`).
 
 # --hints--