deps: update golangci/golangci-lint-action action to v6 (#640)

[![Mend
Renovate](https://app.renovatebot.com/images/banner.svg)](https://renovatebot.com)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[golangci/golangci-lint-action](https://togithub.com/golangci/golangci-lint-action)
| action | major | `v5` -> `v6` |

---

### Release Notes

<details>
<summary>golangci/golangci-lint-action
(golangci/golangci-lint-action)</summary>

###
[`v6`](https://togithub.com/golangci/golangci-lint-action/compare/v5...v6)

[Compare
Source](https://togithub.com/golangci/golangci-lint-action/compare/v5...v6)

</details>

---

### 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.

---

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

---

This PR has been generated by [Mend
Renovate](https://www.mend.io/free-developer-tools/renovate/). View
repository job log
[here](https://developer.mend.io/github/hetznercloud/hcloud-cloud-controller-manager).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNy4zNDAuMTAiLCJ1cGRhdGVkSW5WZXIiOiIzNy4zNDAuMTAiLCJ0YXJnZXRCcmFuY2giOiJtYWluIiwibGFiZWxzIjpbXX0=-->

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/ci.yml

@@ -31,7 +31,7 @@ jobs:
         with:
           go-version: "1.21"
 
-      - uses: golangci/golangci-lint-action@v5
+      - uses: golangci/golangci-lint-action@v6
         with:
           version: v1.58.0 # renovate: datasource=github-releases depName=golangci/golangci-lint