Update README linking to correct complete example

[mrajagopal]

Describe the bug
The link to the complete-example is broken in the readme at this link:
https://github.com/nginxinc/kubernetes-ingress/blob/main/examples/custom-resources/basic-configuration/README.md

The example is similar to the complete example. However, instead of the Ingress resource, we use the VirtualServer.

The README link to "complete example" must point to:
https://github.com/nginxinc/kubernetes-ingress/tree/main/examples/ingress-resources/complete-example

[github-actions]

Hi @mrajagopal thanks for reporting!

Be sure to check out the docs and the Contributing Guidelines while you wait for a human to take a look at this 🙂

Cheers!