JSON to YAML for external LoadBalancer

[programmer04]

Make this page consistent:

• YAML definitions for an object instead of JSON,
• apply style guide rules,
• remove obsolete fragments.

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[programmer04]

/assign @Bradamant3

[sftim]

Nice improvements @programmer04
/lgtm

I've spotted and listed some improvements you could make beyond the ones you've listed here, if you'd like to. To be clear, though, this seems fine to merge as-is.

Mostly these are inline feedback.

The one other tweak I saw is around:

This provides an externally-accessible IP address that sends traffic to the correct port on your cluster nodes provided your cluster runs in a supported environment and is configured with the correct cloud load balancer provider package.

If you have the appetite for a few more changes, you could move that text to be part of the prerequisites section. I think that's a better place for it.

[programmer04]

Howdy @sftim, thanks for the review, I applied all suggestion. Please check

[sftim]

These changes are clearly improving the existing content.
/lgtm

[tengqm]

/approve

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