[Doc] Update preload samples description to latest release

[numerology]

This change is 

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[numerology]

/assign @rmgogogo
/assign @IronPan

[numerology]

/retest
/assign @jingzhang36

[numerology]

/close
In favor of a overriding PR #2839

[k8s-ci-robot]

@numerology: Closed this PR.

In response to this:

/close
In favor of a overriding PR #2839

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