doc: update quick start

[codecov[bot]]

Codecov Report

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

Comparison is base (85bb406) 28.89% compared to head (c4ce1f0) 28.82%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #287 +/- ## ========================================== - Coverage 28.89% 28.82% -0.08% ========================================== Files 114 114 Lines 13590 13590 ========================================== - Hits 3927 3917 -10 - Misses 9280 9291 +11 + Partials 383 382 -1 ``` | [Flag](https://app.codecov.io/gh/kubewharf/kubeadmiral/pull/287/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=kubewharf) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/kubewharf/kubeadmiral/pull/287/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=kubewharf) | `28.82% <ø> (-0.08%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=kubewharf#carryforward-flags-in-the-pull-request-comment) to find out more.

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[Poor12]

/lgtm