Update documention on leader election

[javorszky]

Version

edge

What Kubernetes platforms are you running on?

Kind

Steps to reproduce

There was a question about how leader-election works in Helm, and current documentation is somewhat out of date.

https://docs.nginx.com/nginx-ingress-controller/configuration/global-configuration/command-line-arguments/#-leader-election-lock-name-string

[github-actions]

Hi @javorszky 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!

[AlexFenlon]

Think this should be on the docs repo rather than our repo.