[ja] Add a feature section content "self-healing"

[IbukiMnw]

Add a missing feature sections content in "ja". the title of new content is "self-healing" in "en".

[linux-foundation-easycla]

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[k8s-ci-robot]

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[dipesh-rawat]

@IbukiMnw Thanks you for your contribution.
Could you please sign the CLA before the PR can be reviewed.
You can follow the steps documented here: CLA Steps

[dipesh-rawat]

/easycla

[dipesh-rawat]

/retitle [ja] Add a feature section content "self-healing"

[atoato88]

The URL for the page on deploy preview for reviewing the content updated:

• https://deploy-preview-43979--kubernetes-io-main-staging.netlify.app/ja/#features

[atoato88]

Please check the comments.

[atoato88]

This value is 20 on the content of en.
What is the reason for updating this value with 30?

[atoato88]

Suggested change

	anchor: ReplicaSetがどのように動くか {#how-a-replicaset-works}
	anchor: how-a-replicaset-works

Current code renders #replicasetがどのように動くか-how-a-replicaset-works as anchor, so specify the anchor ID included in the ja content.

[Arhell]

/easycla

[atoato88]

@IbukiMnw
Sorry for mention you, how about the sign to the CLA and updating the content?

[atoato88]

@IbukiMnw
Gentle ping.

Is there any problem about signing the CLA?
If so, please refer this article for checking the CLA process in Japanese.

Besides, please feel free to contact me.

[Gauravpadam]

Closing this as the CLA status is still red
Please feel free to re-open this

/close

[k8s-ci-robot]

@Gauravpadam: Closed this PR.

In response to this:

Closing this as the CLA status is still red
Please feel free to re-open this

/close

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