Fix example ingress for v1 API version

Fix the example ingress in the nw-ingress-creating-a-route-via-an-ingress
module to use the correct format for the ingress v1 API version, and change
the example route to reflect more accurately the route that is generated
for the ingress.

Follow-up to commit aeff3a1.

* modules/nw-ingress-creating-a-route-via-an-ingress.adoc: Fix the ingress
service backend specification and HTTP path specification in the example
ingress object to use the ingress v1 fields.  Tweak the example route to
more accurately reflect the route that will be generated for the example
ingress.

Author: Miciah

modules/nw-ingress-creating-a-route-via-an-ingress.adoc

@@ -29,8 +29,12 @@ spec:
     http:
       paths:
       - backend:
-          serviceName: frontend
-          servicePort: 443
+          service:
+            name: frontend
+            port:
+              number: 443
+        path: /
+        pathType: Prefix
   tls:
   - hosts:
     - www.example.com
@@ -80,9 +84,9 @@ metadata:
     uid: 4e6c59cc-704d-4f44-b390-617d879033b6
 spec:
   host: www.example.com
-  to:
-    kind: Service
-    name: frontend
+  path: /
+  port:
+    targetPort: https
   tls:
     certificate: |
       -----BEGIN CERTIFICATE-----
@@ -94,4 +98,7 @@ spec:
       [...]
       -----END RSA PRIVATE KEY-----
     termination: reencrypt
+  to:
+    kind: Service
+    name: frontend
 ----