Update health check endpoints output examples to match the command example

[YutaHiguchi-bsn]

Description

Aligning kubectl command, curl example and the output examples.

kubectl was using /readyz endpoint as example but
the output example was showing /healthz output,
and one of curl example was using /livez path example.

Align them to use the /readyz

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[Arhell]

/easycla

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