Corrected poll timeout example

[Jay179-sudo]

What type of PR is this?

This PR corrects a small documentation error. /kind documentation

What this PR does / why we need it:

Fixes small documentation errors.

Which issue(s) this PR fixes: Fixes #4775

Special notes for your reviewer:

None

Does this PR introduce a user-facing change?:

NONE

[karmada-bot]

Welcome @Jay179-sudo! It looks like this is your first PR to karmada-io/karmada 🎉

[Jay179-sudo]

/assign @xishanyongye-chang Looking forward to more!

[XiShanYongYe-Chang]

@Jay179-sudo Thanks~ Ask @RainbowMango to help run the CI. /cc @RainbowMango

[RainbowMango]

Ask @RainbowMango to help run the CI.

Done.

/approve

[karmada-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: RainbowMango, Vacant2333

The full list of commands accepted by this bot can be found here.

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Needs approval from an approver in each of these files: - ~~[test/OWNERS](https://github.com/karmada-io/karmada/blob/master/test/OWNERS)~~ [RainbowMango] 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:

Project coverage is 51.76%. Comparing base (6534ffb) to head (deaf341).

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #4783 +/- ## ======================================= Coverage 51.76% 51.76% ======================================= Files 250 250 Lines 24980 24980 ======================================= Hits 12930 12930 Misses 11340 11340 Partials 710 710 ``` | [Flag](https://app.codecov.io/gh/karmada-io/karmada/pull/4783/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=karmada-io) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/karmada-io/karmada/pull/4783/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=karmada-io) | `51.76% <ø> (ø)` | | 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=karmada-io#carryforward-flags-in-the-pull-request-comment) to find out more.

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