naming not matching helm chart in ingress doc

[fc92]

Is this a BUG REPORT or FEATURE REQUEST?

BUG REPORT

What happened:
The ingress is not working without modifying the deployment and service names in the doc.

What you expected to happen:
The ingress should work

How to reproduce it (as minimally and precisely as possible):
In fresh k8s cluster (like kind) deploy nginx-ingress-controller.
Follow documentation for litmus helm chart deployment with ingress.
Try to access the chaos center from your browser (it should not work)
Fix deployment and service names and test again. You should be able to access the chaos center.

Anything else we need to know?:
I open pull request #137 with my working config.