Update README.md

README.md

@@ -5,7 +5,7 @@
 * Open your [Adyen Test Account](https://ca-test.adyen.com/ca/ca/overview/default.shtml) and create a set of [API keys](https://docs.adyen.com/user-management/how-to-get-the-api-key).
 * Go to [gitpod account variables](https://gitpod.io/variables).
 * Set the `ADYEN_API_KEY`, `ADYEN_CLIENT_KEY`, `ADYEN_HMAC_KEY` and `ADYEN_MERCHANT_ACCOUNT variables`.
-* Click the button below!
+* Click the button below.
 
 [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/#https://github.com/adyen-examples/adyen-python-online-payments)