chore(deps): update azure/setup-kubectl action to v4

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
azure/setup-kubectl	action	major	v3 -> v4

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Release Notes

azure/setup-kubectl (azure/setup-kubectl)

### [`v4`](https://togithub.com/azure/setup-kubectl/blob/HEAD/CHANGELOG.md#v400---2024-01-30) [Compare Source](https://togithub.com/azure/setup-kubectl/compare/v3...v4) ##### Changed - [#​90](https://togithub.com/azure/setup-kubectl/issues/90) Migrate to node 20 as node 16 is deprecated

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• [ ] If you want to rebase/retry this PR, check this box

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 95.53%. Comparing base (db97d91) to head (4e169ff).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #303 +/- ## ======================================= Coverage 95.53% 95.53% ======================================= Files 7 7 Lines 358 358 ======================================= Hits 342 342 Misses 11 11 Partials 5 5 ```

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