Update readme with deprecated note

[psschwei]

Fixes #217

/assign @dprotaso

[psschwei]

/override "e2e tests (1.24.2)"
/override "e2e tests (v1.25.2)"

[knative-prow]

@psschwei: /override requires failed status contexts, check run or a prowjob name to operate on.
The following unknown contexts/checkruns were given:

• e2e tests (v1.25.2)

Only the following failed contexts/checkruns were expected:

• EasyCLA
• build-tests_container-freezer_main
• e2e tests (1.24.2)
• e2e tests (1.25.2)
• integration-tests_container-freezer_main
• tide
• unit-tests_container-freezer_main

If you are trying to override a checkrun that has a space in it, you must put a double quote on the context.

In response to this:

/override "e2e tests (1.24.2)"
/override "e2e tests (v1.25.2)"

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[psschwei]

/override "e2e tests (1.25.2)"

[knative-prow]

@psschwei: Overrode contexts on behalf of psschwei: e2e tests (1.25.2)

In response to this:

/override "e2e tests (1.25.2)"

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[psschwei]

/override "e2e tests (1.24.2)"

[knative-prow]

@psschwei: Overrode contexts on behalf of psschwei: e2e tests (1.24.2)

In response to this:

/override "e2e tests (1.24.2)"

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[dprotaso]

/lgtm
/approve

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dprotaso, psschwei

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