add missing json tags

[lionelvillard]

Proposed Changes

• add json tags to sequence status.

[knative-prow-robot]

Hi @lionelvillard. Thanks for your PR.

I'm waiting for a knative 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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[n3wscott]

/ok-to-test
/lgtm
/approve

[knative-prow-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: lionelvillard, n3wscott

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[lionelvillard]

@n3wscott looks like the unit tests are flaky. Can you /retest?

[n3wscott]

/retest

[lionelvillard]

it failed on a different test. Annoying.

[chizhg]

/retest