chore: add placeholder version in README.md file

[ti-chi-bot]

Check List

Tests

• No need to test

  • I checked and no code files have been changed.

skip-checks: true

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please assign leoppro for approval. For more information see the Code Review Process.
Please ensure that each of them provides their approval before proceeding.

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

Details

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[ti-chi-bot]

/release-note-none

[wuhuizuo]

/test ?

[ti-chi-bot]

@wuhuizuo: The following commands are available to trigger required jobs:

/test pull-build

/test pull-check

/test pull-unit-test

The following commands are available to trigger optional jobs:

/test wip-pull-integration-test

Details

In response to this:

/test ?

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[wuhuizuo]

/test wip-pull-integration-test