[TESTONLY] update ko to lastest in 0.11

[chaodaiG]

/assign chaodai
/cc chaodai

/hold

[knative-prow-robot]

@chaodaiG: GitHub didn't allow me to assign the following users: chaodai.

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In response to this:

/assign chaodai
/cc chaodai

/hold

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[knative-prow-robot]

@chaodaiG: GitHub didn't allow me to request PR reviews from the following users: chaodai.

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In response to this:

/assign chaodai
/cc chaodai

/hold

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[knative-prow-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: chaodaiG

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Needs approval from an approver in each of these files:

• test/OWNERS [chaodaiG]

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[knative-prow-robot]

@chaodaiG: The following tests failed, say /retest to rerun all failed tests:

Test name	Commit	Details	Rerun command
pull-knative-serving-autotls-tests	f8f9f59	link	/test pull-knative-serving-autotls-tests
pull-knative-serving-upgrade-tests	f8f9f59	link	/test pull-knative-serving-upgrade-tests
pull-knative-serving-integration-tests	f8f9f59	link	/test pull-knative-serving-integration-tests

Full PR test history. Your PR dashboard.

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[knative-test-reporter-robot]

The following jobs failed:

Test name	Triggers	Retries
pull-knative-serving-integration-tests		0/3
pull-knative-serving-upgrade-tests		0/3

Failed non-flaky tests preventing automatic retry of pull-knative-serving-integration-tests:

test/conformance/api/v1.TestBlueGreenRoute
test/conformance/api/v1.TestUpdateConfigurationMetadata
test/conformance/api/v1.TestContainerErrorMsg
test/conformance/api/v1.TestTranslation
test/conformance/api/v1.TestRevisionTimeout
test/conformance/api/v1.TestServiceAccountValidation
test/conformance/api/v1.TestServiceBYOName
test/conformance/api/v1.TestSingleConcurrency

and 35 more.