chore(deps): Update helm/chart-testing-action action to v2.6.0 (#408)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [helm/chart-testing-action](https://togithub.com/helm/chart-testing-action) | action | minor | `v2.4.0` -> `v2.6.0` |

---

### Release Notes

<details>
<summary>helm/chart-testing-action (helm/chart-testing-action)</summary>

### [`v2.6.0`](https://togithub.com/helm/chart-testing-action/releases/tag/v2.6.0)

[Compare Source](https://togithub.com/helm/chart-testing-action/compare/v2.5.0...v2.6.0)

#### What's Changed

-   docs: bump helm/kind-action version by [@&#8203;dunglas](https://togithub.com/dunglas) in [https://github.com/helm/chart-testing-action/pull/122](https://togithub.com/helm/chart-testing-action/pull/122)
-   bump ct to v3.10.0 by [@&#8203;cpanato](https://togithub.com/cpanato) in [https://github.com/helm/chart-testing-action/pull/134](https://togithub.com/helm/chart-testing-action/pull/134)

**Full Changelog**: helm/chart-testing-action@v2...v2.6.0

### [`v2.5.0`](https://togithub.com/helm/chart-testing-action/releases/tag/v2.5.0)

[Compare Source](https://togithub.com/helm/chart-testing-action/compare/v2.4.0...v2.5.0)

#### What's Changed

-   Download binary with right arch by [@&#8203;Ludea](https://togithub.com/Ludea) in [https://github.com/helm/chart-testing-action/pull/118](https://togithub.com/helm/chart-testing-action/pull/118)
-   Bump ct and cleanup script by [@&#8203;cpanato](https://togithub.com/cpanato) in [https://github.com/helm/chart-testing-action/pull/124](https://togithub.com/helm/chart-testing-action/pull/124)
-   Bump sigstore/cosign-installer from [`c3667d9`](https://togithub.com/helm/chart-testing-action/commit/c3667d99424e7e6047999fb6246c0da843953c65) to [`6e04d22`](https://togithub.com/helm/chart-testing-action/commit/6e04d228eb30da1757ee4e1dd75a0ec73a653e06) by [@&#8203;dependabot](https://togithub.com/dependabot) in [https://github.com/helm/chart-testing-action/pull/125](https://togithub.com/helm/chart-testing-action/pull/125)
-   Bump sigstore/cosign-installer from 3.1.1 to 3.1.2 by [@&#8203;dependabot](https://togithub.com/dependabot) in [https://github.com/helm/chart-testing-action/pull/127](https://togithub.com/helm/chart-testing-action/pull/127)
-   Bump actions/checkout from 3 to 4 by [@&#8203;dependabot](https://togithub.com/dependabot) in [https://github.com/helm/chart-testing-action/pull/128](https://togithub.com/helm/chart-testing-action/pull/128)

#### New Contributors

-   [@&#8203;Ludea](https://togithub.com/Ludea) made their first contribution in [https://github.com/helm/chart-testing-action/pull/118](https://togithub.com/helm/chart-testing-action/pull/118)
-   [@&#8203;dependabot](https://togithub.com/dependabot) made their first contribution in [https://github.com/helm/chart-testing-action/pull/125](https://togithub.com/helm/chart-testing-action/pull/125)

**Full Changelog**: helm/chart-testing-action@v2.4.0...v2.5.0

</details>

---

### Configuration

📅 **Schedule**: Branch creation - "before 4am 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

---

This PR has been generated by [Renovate Bot](https://togithub.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNi4xMDkuNCIsInVwZGF0ZWRJblZlciI6IjM2LjEwOS40IiwidGFyZ2V0QnJhbmNoIjoibWFpbiJ9-->

Author: cq-bot

.github/workflows/lint_test.yml

@@ -26,7 +26,7 @@ jobs:
           python-version: 3.7
 
       - name: Set up chart-testing
-        uses: helm/chart-testing-action@v2.4.0
+        uses: helm/chart-testing-action@v2.6.0
 
       - name: Run chart-testing (lint)
         run: make lint