docs: optimize deploy/README.md

[Okabe-Rintarou-0]

What type of PR is this? documentation

optimize deploy/README.md What this PR does / why we need it:

Which issue(s) this PR fixes:

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[kmesh-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hzxuzhonghu

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/kmesh-net/kmesh/blob/main/OWNERS)~~ [hzxuzhonghu] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

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unittests	31.21% <ø> (?)

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