[zh-cn] sync kubeadm/install-kubeadm.md kubelet-integration.md write-new-topic.md

[my-git9]

# Changes to be committed:
#       modified:   content/zh-cn/docs/contribute/style/write-new-topic.md
#       modified:   content/zh-cn/docs/setup/production-environment/tools/kubeadm/install-kubeadm.md
#       modified:   content/zh-cn/docs/setup/production-environment/tools/kubeadm/kubelet-integration.md

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[tengqm]

/lgtm

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 4317ec9502c5316febe39f811a0082699313165b

[tengqm]

/approve

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[asa3311]

/lgtm

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: a3465a17522b60b2b3649846c9126a227c39b912