[ja] Update content/ja/docs/concepts/cluster-administration/addons.md

[kfess]

Description

Updated Japanese translation: content/ja/docs/concepts/cluster-administration/addons.md.

Website Link:

• Japanese: https://kubernetes.io/ja/docs/concepts/cluster-administration/addons/
• English: https://kubernetes.io/docs/concepts/cluster-administration/addons/

Issue

Closes: #53132

/area localization /language ja

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[t-inu]

レビュー中です。

• 内容としての差分は#計測パートのみであることを確認しました

Gateway API、Spiderpool、Terwayの追加もされているようです。

[kfess]

こちら失礼しました。ローカル環境で古いファイルを参照してしまっていたりなど、、 修正しました。

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 31ba24ea3360d1ba8d1ace704b5b87442409be36

[t-inu]

/assign Okabe-Junya for approval

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aoi1, Okabe-Junya

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