ci: standardize rtCamp/action-slack-notify to v2.2.1 across workflows

[Ankitsinghsisodya]

Fixes #8997

Summary

• Update rtCamp/action-slack-notify in kind-e2e.yaml from v2.1.0 to v2.2.1 to match the version already used in weekly-office-hours-slack-reminder.yaml

[knative-prow]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: Ankitsinghsisodya
Once this PR has been reviewed and has the lgtm label, please assign dprotaso for approval. For more information see the Code Review Process.

The full list of commands accepted by this bot can be found here.

Details

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[knative-prow]

Hi @Ankitsinghsisodya. 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.

Tip

We noticed you've done this a few times! Consider joining the org to skip this step and gain /lgtm and other bot rights. We recommend asking approvers on your previous PRs to sponsor you.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

I understand the commands that are listed here.

Details

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-sigs/prow repository.

[Copilot]

Pull request overview

Standardizes the rtCamp/action-slack-notify GitHub Action version used for Slack notifications so workflows behave consistently and future updates are easier to manage (per #8997).

Changes:

• Bump .github/workflows/kind-e2e.yaml Slack notify action from rtCamp/action-slack-notify@v2.1.0 to @v2.2.1 to match the existing version used elsewhere.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.