fix(k8s): update ingress class configuration for schema

Remove the deprecated annotation for ingress class and add 
ingressClassName to align with current Kubernetes standards. 
This ensures better compatibility and adherence to best practices.

k8s/ingress-prod.yaml

@@ -3,7 +3,6 @@ kind: Ingress
 metadata:
   name: schemas-ingress
   annotations:
-    kubernetes.io/ingress.class: "alb"
     alb.ingress.kubernetes.io/group.name: "default"
     alb.ingress.kubernetes.io/scheme: internet-facing
     alb.ingress.kubernetes.io/target-type: instance
@@ -11,6 +10,7 @@ metadata:
     alb.ingress.kubernetes.io/ssl-redirect: "443"
     alb.ingress.kubernetes.io/healthcheck-path: '/health'
 spec:
+  ingressClassName: "alb"
   rules:
   - host: "schemas.unbound.se"
     http: