fix typo

README.md

@@ -8,7 +8,7 @@ This project aims to help you calculate the Iranian Rials value historically
 
 When you put a date we go back in time and buy some of the Azadi coins with the money you provided. After that, we return to the current day, sell those Azadi coins, and show you the money.
 
-## If you find this project helpful, please give it a start. It helps new people find out about it. :)
+## If you find this project helpful, please give it a Start. It helps new people find out about it. :)
 
 ## Our Data