An example cmd error

[chenmin1992]

What problem does this PR solve?

URL is not equal to instruction text.

What is changed and how it works?

change the URL and make it correct.

Check List

Tests

• No code

Code changes

Side effects

Related changes

• Need to cherry-pick to the release branch
• Need to update the documentation

[ti-chi-bot]

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[sre-bot]

No release note, Please follow https://github.com/pingcap/community/blob/master/contributors/release-note-checker.md

[chenmin1992]

Is necessary to have a release note for no code changing?

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[purelind]

/run-integration-test