remove depericated apiVersoin (kubernetes-sigs#1850)

* remove depericated apiVersoin

Depericated apiVersion removed in Ingress resource

* Update 2048_full.yaml

* Update 2048_full.yaml

* Update echoserver-ingress.yaml

* Update 2048_full.yaml

* Update echoserver-ingress.yaml

* Update 2048_full.yaml

* Update echoserver-ingress.yaml

* Update 2048_full.yaml

Author: ngoyal16

docs/examples/2048/2048_full.yaml

@@ -40,7 +40,7 @@ spec:
   selector:
     app.kubernetes.io/name: app-2048
 ---
-apiVersion: extensions/v1beta1
+apiVersion: networking.k8s.io/v1beta1
 kind: Ingress
 metadata:
   namespace: game-2048
@@ -56,4 +56,4 @@ spec:
           - path: /*
             backend:
               serviceName: service-2048
-              servicePort: 80
+              servicePort: 80

docs/examples/echoservice/echoserver-ingress.yaml

@@ -1,4 +1,4 @@
-apiVersion: extensions/v1beta1
+apiVersion: networking.k8s.io/v1beta1
 kind: Ingress
 metadata:
   name: echoserver