add cypress badge

Author: AmeliaES

README.md

@@ -1,3 +1,4 @@
+[![Cypress Tests](https://github.com/AmeliaES/javaScriptCalculator/actions/workflows/cypress.yml/badge.svg)](https://github.com/AmeliaES/javaScriptCalculator/actions/workflows/cypress.yml) 
 # Create a simple calculator in JavaScript
 
 ## Define what buttons the user can click on and what each button does
@@ -81,4 +82,4 @@ eg. when writing the following, and leaving them empty like this, they show as p
   it('checks the operator buttons contain the correct operators', () => {
     
   })
-```
+```