fix typo

[soulseen]

Signed-off-by: zhuxiaoyang [email protected]

fix typo, update doc.

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[tekton-robot]

Hi @soulseen. Thanks for your PR.

I'm waiting for a tektoncd member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[soulseen]

@googlebot I signed it!

[googlebot]

CLAs look good, thanks!

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[dibyom]

/ok-to-test

[dibyom]

Thanks @soulseen !!

/lgtm

[tekton-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dibyom

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[dibyom]

@soulseen if you rebase the PR I think the build tests should pass now that #275 has been merged

[dibyom]

/test pull-tekton-triggers-build-tests