Merge branch 'bug-fix-typo' and update footer to 2023

Author: j409678976-oss

README.md

@@ -1,6 +1,4 @@
- 
 2023 XYZ, Inc. 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.
@@ -14,4 +12,4 @@ Output
    simple interest = p*t*r
 ```
 
-_© 2022 XYZ, Inc._
+_© 2023 XYZ, Inc._