fix(route53): add RoutingControlArn to HealthCheck patch (aws#18645)

The Route53 HealthCheckConfig structure is modeled in the CloudFormation spec as
a JSON blob, but it was previously modeled as an explicit structure (see
structure, as it's not updated with the Route53 spec. This adds the missing
RoutingControlArn to the structure.

fixes aws#18570


----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

packages/@aws-cdk/cfnspec/spec-source/specification/000_cfn/660_Route53_HealthCheck_patch.json

@@ -118,6 +118,12 @@
                 "Required": false,
                 "UpdateType": "Mutable"
               },
+              "RoutingControlArn": {
+                "Documentation": "http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-route53-healthcheck-healthcheckconfig.html#cfn-route53-healthcheck-healthcheckconfig-routingcontrolarn",
+                "PrimitiveType": "String",
+                "Required": false,
+                "UpdateType": "Mutable"
+              },
               "SearchString": {
                 "Documentation": "http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-route53-healthcheck-healthcheckconfig.html#cfn-route53-healthcheck-healthcheckconfig-searchstring",
                 "PrimitiveType": "String",
@@ -154,4 +160,4 @@
       }
     }
   }
-}
+}