Fix typo in README

Author: Wahaj1224

README.md

@@ -1,5 +1,7 @@
 # Introduction to Git and GitHub
 
+I M.Wahaj yasin changed this file
+
 ## Simple Interest Calculator
 
 A calculator that calculates simple interest given principal, annual rate of interest and time period in years.
@@ -11,6 +13,7 @@ Input:
    r, annual rate of interest
 Output
    simple interest = p*t*r
+
 ```
 
 _© 2022 XYZ, Inc._