docs: replace deprecated ingress.class annotation

Documentation and examples used a deprecated annotation to set the Ingress class name. This commit replaces it with the correct version using spec.ingressClassName .

Signed-off-by: Marcel Lautenbach <mlautenb@gmail.com>
(cherry picked from commit 9d335ad814)

deploy/examples/dashboard-ingress-https.yaml

@@ -11,12 +11,12 @@ metadata:
   name: rook-ceph-mgr-dashboard
   namespace: rook-ceph # namespace:cluster
   annotations:
-    kubernetes.io/ingress.class: "nginx"
     kubernetes.io/tls-acme: "true"
     nginx.ingress.kubernetes.io/backend-protocol: "HTTPS"
     nginx.ingress.kubernetes.io/server-snippet: |
       proxy_ssl_verify off;
 spec:
+  ingressClassName: "nginx"
   tls:
     - hosts:
         - rook-ceph.example.com