chore(deps): update azure/setup-kubectl action to v4 (#6286)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [azure/setup-kubectl](https://redirect.github.com/azure/setup-kubectl)
| action | major | `v3` -> `v4` |

---

### Release Notes

<details>
<summary>azure/setup-kubectl (azure/setup-kubectl)</summary>

###
[`v4`](https://redirect.github.com/azure/setup-kubectl/blob/HEAD/CHANGELOG.md#v400---2024-01-30)

[Compare
Source](https://redirect.github.com/azure/setup-kubectl/compare/v3...v4)

##### Changed

-
[#&#8203;90](https://redirect.github.com/azure/setup-kubectl/issues/90)
Migrate to node 20 as node 16 is deprecated

</details>

---

### Configuration

📅 **Schedule**: Branch creation - "on the first day of the month" (UTC),
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.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

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Signed-off-by: Mend Renovate <[email protected]>

.github/workflows/ci-docker-hotrod.yml

@@ -59,7 +59,7 @@ jobs:
         esac
     - name: Install kubectl
       if: matrix.runtime == 'k8s'
-      uses: azure/setup-kubectl@v3
+      uses: azure/setup-kubectl@v4
       with:
         version: 'latest'