Update Redis support

Added check marks for Redis input and output bindings, which are now supported.

Author: MSFTeegarden

includes/functions-bindings.md

@@ -24,7 +24,7 @@ This table shows the bindings that are supported in the major versions of the Az
 | [Mobile Apps](../articles/azure-functions/functions-bindings-mobile-apps.md)             |✔| | |✔|✔|
 | [Notification Hubs](../articles/azure-functions/functions-bindings-notification-hubs.md) |✔|| | |✔|
 | [Queue storage](../articles/azure-functions/functions-bindings-storage-queue.md)         |✔|✔|✔| |✔|
-| [Redis](../articles/azure-functions/functions-bindings-cache.md)                         | |✔|✔| | |
+| [Redis](../articles/azure-functions/functions-bindings-cache.md)                         | |✔|✔|✔|✔|
 | [RabbitMQ](../articles/azure-functions/functions-bindings-rabbitmq.md)<sup>3</sup>             | |✔|✔| |✔|
 | [SendGrid](../articles/azure-functions/functions-bindings-sendgrid.md)                   |✔|✔| | |✔|
 | [Service Bus](../articles/azure-functions/functions-bindings-service-bus.md)             |✔|✔|✔| |✔|