[ja]Update the description of how to access the dashboard

[sancppp]

Description

Update http://localhost:8001/api/v1/namespaces/kubernetes-dashboard/services/https:kubernetes-dashboard:/proxy/ to http://localhost:8001/api/v1/namespaces/kubernetes-dashboard/services/https:kubernetes-dashboard-kong-proxy:443/proxy/

ref:

• https://github.com/kubernetes/dashboard/blob/master/docs/user/accessing-dashboard/README.md#kubectl-proxy
• Update the description of how to access the dashboard #48205 (comment)

[k8s-ci-robot]

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[Okabe-Junya]

/hold

Once #48210 merged, feel free to unhold