Update readme pic.

[yanggangtony]

What type of PR is this?
/kind bug
/kind cleanup

What this PR does / why we need it:
Update readme pic.

Which issue(s) this PR fixes:

[kubean-pr-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: yanggangtony
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[ErikJiang]

Please visit: kubean docs to confirm, the current logo image display is normal

[yanggangtony]

Please visit: kubean docs to confirm, the current logo image display is normal

You mean the markdown can not be review through the code?

[yanggangtony]

The docs is now build by

# Run Chinese documentation locally
$ mkdocs serve -f docs/mkdocs.zh.yml

# Run English documentation locally
$ mkdocs serve -f docs/mkdocs.en.yml

it is just for web review..
custom_dir: './overrides/'.

I will close this pr for mistake.
Thanks.
@ErikJiang

[yanggangtony]

/close

[kubean-pr-robot]

@yanggangtony: Closed this PR.

In response to this:

/close

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