Update actions/checkout action to v6 (#6)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/checkout](https://github.com/actions/checkout) | action | major | `v4` → `v6` |

---

### Release Notes

<details>
<summary>actions/checkout (actions/checkout)</summary>

### [`v6.0.3`](https://github.com/actions/checkout/blob/HEAD/CHANGELOG.md#v603)

[Compare Source](actions/checkout@v6.0.2...v6.0.3)

- Fix checkout init for SHA-256 repositories by [@&#8203;yaananth](https://github.com/yaananth) in [#&#8203;2439](actions/checkout#2439)
- fix: expand merge commit SHA regex and add SHA-256 test cases by [@&#8203;yaananth](https://github.com/yaananth) in [#&#8203;2414](actions/checkout#2414)

### [`v6.0.2`](https://github.com/actions/checkout/blob/HEAD/CHANGELOG.md#v602)

[Compare Source](actions/checkout@v6.0.1...v6.0.2)

- Fix tag handling: preserve annotations and explicit fetch-tags by [@&#8203;ericsciple](https://github.com/ericsciple) in [#&#8203;2356](actions/checkout#2356)

### [`v6.0.1`](https://github.com/actions/checkout/blob/HEAD/CHANGELOG.md#v601)

[Compare Source](actions/checkout@v6...v6.0.1)

- Add worktree support for persist-credentials includeIf by [@&#8203;ericsciple](https://github.com/ericsciple) in [#&#8203;2327](actions/checkout#2327)

### [`v6.0.0`](https://github.com/actions/checkout/blob/HEAD/CHANGELOG.md#v600)

[Compare Source](actions/checkout@v6...v6)

- Persist creds to a separate file by [@&#8203;ericsciple](https://github.com/ericsciple) in [#&#8203;2286](actions/checkout#2286)
- Update README to include Node.js 24 support details and requirements by [@&#8203;salmanmkc](https://github.com/salmanmkc) in [#&#8203;2248](actions/checkout#2248)

### [`v6`](https://github.com/actions/checkout/blob/HEAD/CHANGELOG.md#v603)

[Compare Source](actions/checkout@v5.0.1...v6)

- Fix checkout init for SHA-256 repositories by [@&#8203;yaananth](https://github.com/yaananth) in [#&#8203;2439](actions/checkout#2439)
- fix: expand merge commit SHA regex and add SHA-256 test cases by [@&#8203;yaananth](https://github.com/yaananth) in [#&#8203;2414](actions/checkout#2414)

### [`v5.0.1`](https://github.com/actions/checkout/blob/HEAD/CHANGELOG.md#v501)

[Compare Source](actions/checkout@v5...v5.0.1)

- Port v6 cleanup to v5 by [@&#8203;ericsciple](https://github.com/ericsciple) in [#&#8203;2301](actions/checkout#2301)

### [`v5.0.0`](https://github.com/actions/checkout/blob/HEAD/CHANGELOG.md#v500)

[Compare Source](actions/checkout@v5...v5)

- Update actions checkout to use node 24 by [@&#8203;salmanmkc](https://github.com/salmanmkc) in [#&#8203;2226](actions/checkout#2226)

### [`v5`](https://github.com/actions/checkout/blob/HEAD/CHANGELOG.md#v501)

[Compare Source](actions/checkout@v4.3.1...v5)

- Port v6 cleanup to v5 by [@&#8203;ericsciple](https://github.com/ericsciple) in [#&#8203;2301](actions/checkout#2301)

</details>

---

### Configuration

📅 **Schedule**: (UTC)

- 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://github.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0My4yMTcuMSIsInVwZGF0ZWRJblZlciI6IjQzLjIxNy4xIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6W119-->

Co-authored-by: hoodn <hood.noah@gmail.com>
Reviewed-on: https://gitea.k3s.noah-hood.io/hoodn/certmanager-porkbun-webhook/pulls/6
Co-authored-by: renovate-bot <renovate-bot@example.local>
Co-committed-by: renovate-bot <renovate-bot@example.local>

Author: renovate-bot

.gitea/workflows/ci.yaml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Set up Go
         uses: actions/setup-go@v5
@@ -46,7 +46,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Set up Go
         uses: actions/setup-go@v5

.gitea/workflows/release.yaml

@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3