Example links use kubernetes/examples

Fix #5203

Previously, many of the Kubernetes links used
`https://github.com/kubernetes/kubernetes/examples`. This directory was
deprecated through
https://github.com/kubernetes/kubernetes/commit/cb712e41d435dbb42519bded680fef4043dd23b3,
in favor of the new `examples` repo hosted at
`https://github.com/kubernetes/examples`. This commit updates all links
accordingly.

docs/concepts/services-networking/connect-applications-service.md

@@ -169,7 +169,7 @@ Till now we have only accessed the nginx server from within the cluster. Before
 * An nginx server configured to use the certificates
 * A [secret](/docs/user-guide/secrets) that makes the certificates accessible to pods
 
-You can acquire all these from the [nginx https example](https://github.com/kubernetes/kubernetes/tree/{{page.githubbranch}}/examples/https-nginx/), in short:
+You can acquire all these from the [nginx https example](https://github.com/kubernetes/examples/tree/{{page.githubbranch}}/staging/https-nginx/), in short:
 
 ```shell
 $ make keys secret KEY=/tmp/nginx.key CERT=/tmp/nginx.crt SECRET=/tmp/secret.json
@@ -188,7 +188,7 @@ Now modify your nginx replicas to start an https server using the certificate in
 Noteworthy points about the nginx-secure-app manifest:
 
 - It contains both Deployment and Service specification in the same file.
-- The [nginx server](https://github.com/kubernetes/kubernetes/tree/{{page.githubbranch}}/examples/https-nginx/default.conf) serves http traffic on port 80 and https traffic on 443, and nginx Service exposes both ports.
+- The [nginx server](https://github.com/kubernetes/examples/tree/{{page.githubbranch}}/staging/https-nginx/default.conf) serves http traffic on port 80 and https traffic on 443, and nginx Service exposes both ports.
 - Each container has access to the keys through a volume mounted at /etc/nginx/ssl. This is setup *before* the nginx server is started.
 
 ```shell