Add target nodes AWS ELB annotation documentation

content/en/docs/concepts/services-networking/service.md

@@ -863,6 +863,7 @@ There are other annotations to manage Classic Elastic Load Balancers that are de
         service.beta.kubernetes.io/aws-load-balancer-healthcheck-interval: "20"
         # The approximate interval, in seconds, between health checks of an
         # individual instance. Defaults to 10, must be between 5 and 300
+
         service.beta.kubernetes.io/aws-load-balancer-healthcheck-timeout: "5"
         # The amount of time, in seconds, during which no response means a failed
         # health check. This value must be less than the service.beta.kubernetes.io/aws-load-balancer-healthcheck-interval
@@ -870,6 +871,10 @@ There are other annotations to manage Classic Elastic Load Balancers that are de
 
         service.beta.kubernetes.io/aws-load-balancer-extra-security-groups: "sg-53fae93f,sg-42efd82e"
         # A list of additional security groups to be added to the ELB
+
+        service.beta.kubernetes.io/aws-load-balancer-target-node-labels: "ingress-gw,gw-name=public-api"
+        # A comma separated list of key-value pairs which are used
+        # to select the target nodes for the load balancer
 ```
 
 #### Network Load Balancer support on AWS {#aws-nlb-support}