update js9-r

Author: mzeeshan138

Readme.md

@@ -31,6 +31,8 @@ Each file is named based on the problem statement it solves. Example:
 - 📄 **js6-write-a-program-to-count-the-digits-in-a-number.js** ➝ Calculate the digits in a Number
 - 📄 **js7-write-a-program-to-find-the-largest-digit-in-a-number.js** ➝ Find the Largest digit in a Number
 - 📄 **js8-write-a-program-to-find-the-smallest-digit-in-a-number.js** ➝ Find the smallest digit in a Number
+- 📄 **js9-write-a-program-to-check-given-year-is-a-leap-year-or-not.js** ➝ Check Gieven Year is a Leap Year
+- 📄 **.js** ➝ Find the smallest digit in a Number
 
 ## 🛠️ Technologies Used