Fixed footer typo in README.md

Author: Prabha

README.md

@@ -1,7 +1,6 @@
 # Introduction to Git and GitHub
 
 ## Simple Interest Calculator
-
 A calculator that calculates simple interest given principal, annual rate of interest and time period in years.
 
 ```
@@ -13,4 +12,4 @@ Output
    simple interest = p*t*r
 ```
 
-_© 2022 XYZ, Inc._
+_© 2023 XYZ, Inc._