chore(deps): update actions/checkout action to v6 (#13)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/checkout](https://redirect.github.com/actions/checkout) |
action | major | `v5.0.1` → `v6.0.2` |

---

### Release Notes

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

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

[Compare
Source](https://redirect.github.com/actions/checkout/compare/v6.0.1...v6.0.2)

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

###
[`v6.0.1`](https://redirect.github.com/actions/checkout/compare/v6.0.0...v6.0.1)

[Compare
Source](https://redirect.github.com/actions/checkout/compare/v6.0.0...v6.0.1)

###
[`v6.0.0`](https://redirect.github.com/actions/checkout/compare/v5.0.1...v6.0.0)

[Compare
Source](https://redirect.github.com/actions/checkout/compare/v5.0.1...v6.0.0)

</details>

---

### Configuration

📅 **Schedule**: Branch creation - "after 9am 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 is behind base branch, 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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View the [repository job
log](https://developer.mend.io/github/masterpointio/github-action-trunk-upgrade).

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Author: renovate[bot]

.github/workflows/lint.yaml

@@ -21,7 +21,7 @@ jobs:
       # SECURITY: With pull_request_target, checkout defaults to the base branch (main)
       # We must explicitly checkout the PR head to lint the actual changes
       - name: Check out Git repository
-        uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           # Checkout the actual PR code, not the base branch
           ref: ${{ github.event.pull_request.head.sha }}

.github/workflows/trunk-upgrade.yaml

@@ -17,7 +17,7 @@ jobs:
       pull-requests: write
     steps:
       - name: Checkout
-        uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Run Trunk Upgrade
         uses: ./ # Use the local action for self-testing