fix the usage of PickVersion in offline installation

[STRRL]

Signed-off-by: STRRL im@strrl.dev

It's a part of #301

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• g1eny0ung

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[ti-chi-bot]

@STRRL: Adding label: do-not-merge/blocked-paths because PR changes a protected file.

Reasons for blocking this PR:

[This PR modifies the files under the docs or versioned_docs folder and requires the docs team to follow up on the PR.

/label documentation
]

• docs/offline-installation.md

• versioned_docs/version-2.0.7/offline-installation.md

• versioned_docs/version-2.1.5/offline-installation.md

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[STRRL]

Hi @g1eny0ung PTAL

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[g1eny0ung]

LGTM

[STRRL]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 62cc17a