updated VPE documentation

website/docs/r/is_virtual_endpoint_gateway.html.markdown

@@ -81,8 +81,12 @@ Review the argument references that you can specify for your resource.
 - `target` - (Required, List) The endpoint gateway target.
 
   Nested scheme for `target`:
-  - `crn` - (Optional, Forces new resource, String) The CRN for this provider cloud service, or the CRN for the user's instance of a provider cloud service.. If CRN not specified, `name` must be specified. 
-  - `name` - (Required, Forces new resource, String) The endpoint gateway target name.
+  - `crn` - (Optional, Forces new resource, String) The CRN for this provider cloud service, or the CRN for the user's instance of a provider cloud service.
+
+    **NOTE:** If `crn` is not specified, `name` must be specified. 
+  - `name` - (Optional, Forces new resource, String) The endpoint gateway target name.
+
+    **NOTE:** If `name` is not specified, `crn` must be specified. 
   - `resource_type` - (Required, String) The endpoint gateway target resource type. The possible values are `provider_cloud_service`, `provider_infrastructure_service`.
 - `vpc` - (Required, Forces new resource, String) The VPC ID.