docs(payments-plugin): Update README.md (#2229)

Stripe link was broken

packages/payments-plugin/src/stripe/README.md

@@ -2,4 +2,4 @@
 
 Plugin to enable payments through [Stripe](https://stripe.com/docs).
 
-For documentation, see https://www.vendure.io/docs/typescript-api/payments-plugin/stripe-plugin
+For documentation, see [https://www.vendure.io/docs/typescript-api/payments-plugin/stripe-plugin](https://docs.vendure.io/typescript-api/core-plugins/payments-plugin/stripe-plugin/)https://docs.vendure.io/typescript-api/core-plugins/payments-plugin/stripe-plugin/