chore(deps): update actions/checkout action to v6 (#1362)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/checkout](https://redirect.github.com/actions/checkout) |
action | major | `v5.0.0` -> `v6.0.0` |

---

### Release Notes

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

###
[`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)

###
[`v5.0.1`](https://redirect.github.com/actions/checkout/releases/tag/v5.0.1)

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

##### What's Changed

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

**Full Changelog**:
<actions/checkout@v5...v5.0.1>

</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 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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.github/workflows/checks.yml

@@ -15,7 +15,7 @@ jobs:
         os: [ ubuntu-latest, macos-latest, windows-latest ]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v5.0.0
+      - uses: actions/checkout@v6.0.0
       - name: Set up Python
         uses: actions/setup-python@v6.0.0
         with:
@@ -74,7 +74,7 @@ jobs:
         os: [ ubuntu-latest, macos-latest, windows-latest ]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v5.0.0
+      - uses: actions/checkout@v6.0.0
       - name: Set up Python
         uses: actions/setup-python@v6.0.0
         with:
@@ -109,7 +109,7 @@ jobs:
     needs: test
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5.0.0
+      - uses: actions/checkout@v6.0.0
       - uses: actions/setup-python@v6
         with:
           python-version: "3.12"
@@ -159,7 +159,7 @@ jobs:
         ports:
           - "3000:3000"
     steps:
-      - uses: actions/checkout@v5.0.0
+      - uses: actions/checkout@v6.0.0
       - name: Set up Python
         uses: actions/setup-python@v6.0.0
         with:

.github/workflows/release.yml

@@ -12,7 +12,7 @@ jobs:
     permissions:
       id-token: write
     steps:
-      - uses: actions/checkout@v5.0.0
+      - uses: actions/checkout@v6.0.0
       - name: Install Hatchling
         run: pip install --upgrade hatchling
       - name: Build