use newer and recommended TLS 1.3 security policy for NLBs

Author: Martin Linkhorst

cluster/manifests/aws-load-balancer-controller/deployment.yaml

@@ -27,6 +27,7 @@ spec:
         - --feature-gates=ServiceTypeLoadBalancerOnly=true
         - --webhook-cert-file=admission-controller.pem
         - --webhook-key-file=admission-controller-key.pem
+        - --default-ssl-policy=ELBSecurityPolicy-TLS13-1-2-2021-06
         - --default-load-balancer-scheme=internet-facing
         - --default-target-type=ip
         image: container-registry.zalando.net/teapot/aws-load-balancer-controller:v2.12.0-main-2.patched