docs: link to product documentation for Equinix Fabric Cloud Router

The resource documentation should link to the product documentation. API documentation helps explain how the Terraform attributes map to the API, but it doesn't help a user understand what the underlying service is or why and where it should be used.

Signed-off-by: Marques Johansson <[email protected]>

docs/resources/equinix_fabric_cloud_router.md

@@ -8,9 +8,13 @@ description: |-
 
 # equinix_fabric_cloud_router (Resource)
 
-Fabric V4 API compatible resource allows creation and management of Equinix Fabric Cloud Router
+Fabric V4 API compatible resource allows creation and management of [Equinix Fabric Cloud Router](https://docs.equinix.com/en-us/Content/Interconnection/FCR/FCR-intro.htm#HowItWorks).
 
-API documentation can be found here - https://developer.equinix.com/dev-docs/fabric/api-reference/fabric-v4-apis#fabric-cloud-routers
+~> **Note** Equinix Fabric v4 resources and datasources are currently in Beta. The interfaces related to `equinix_fabric_` resources and datasources may change ahead of general availability. Please, do not hesitate to report any problems that you experience by opening a new [issue](https://github.com/equinix/terraform-provider-equinix/issues/new?template=bug.md)
+
+Additional Fabric Cloud Router documentation:
+* Getting Starts: <https://docs.equinix.com/en-us/Content/Interconnection/FCR/FCR-intro.htm#HowItWorks>
+* API: <https://developer.equinix.com/dev-docs/fabric/api-reference/fabric-v4-apis#fabric-cloud-routers>
 
 ## Example Usage