chore:update leader-elect chart config

[qinguoyi]

What this PR does / why we need it

update leader-elect chart config

Which issue(s) this PR fixes

none

Special notes for your reviewer

Does this PR introduce a user-facing change?

[kerthcet]

Sorry, I should explain more clear about the advices, what we need is just an example about how to configure the controller args.

Please squash the commit after addressing the comments. Thanks.

[kerthcet]

/kind documentation

[qinguoyi]

tk, as suggested, I re-push the code.

but, i still have a question, what is the difference between value.yaml and value.global.yaml, because there are already complete examples to config in value.yaml

[kerthcet]

tk, as suggested, I re-push the code.

but, i still have a question, what is the difference between value.yaml and value.global.yaml, because there are already complete examples to config in value.yaml

That's a good question, the answer is values.yaml is autogenerated, if you take a look at the Makefile, we have a helm command, once run make helm, the values.yaml will be generated and overwritten, so we have another global values yaml to store customized configurations.

Anyway, we need to update the chart README.md to avoid such confusions.

[kerthcet]

/lgtm
/approve

Thanks @qinguoyi for your patience and efforts.