docs: keep writing consistent across pages

[caozhuozi]

What type of PR is this?

/kind documentation

What this PR does / why we need it:

The PR serves as the following work to complete the comment of PR #975:
#975 (comment)

This page is actually similar to Exec, Logs, Attach, PortForward. Let's make the content and style of the descriptions consistent across multiple pages.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Please feel free to leave comments!

Does this PR introduce a user-facing change?

NONE

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[k8s-ci-robot]

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[wzshiming]

/ok-to-test

[wzshiming]

/approve
/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: caozhuozi, wzshiming

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