chore(deps): bump actions/checkout from 5 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/lint.yml

@@ -6,7 +6,7 @@ jobs:
     lint:
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/checkout@v5
+            - uses: actions/checkout@v6
             - uses: ./.github/actions/setup-python
             - run: |
                   uv run ruff check --fix
@@ -15,13 +15,13 @@ jobs:
     typecheck:
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/checkout@v5
+            - uses: actions/checkout@v6
             - uses: ./.github/actions/setup-python
             - run: uv run ty check
 
     vulture:
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/checkout@v5
+            - uses: actions/checkout@v6
             - uses: ./.github/actions/setup-python
             - run: uv run vulture --min-confidence 100 --exclude ".venv" .

.github/workflows/pytest.yml

@@ -6,7 +6,7 @@ jobs:
     pytest:
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/checkout@v5
+            - uses: actions/checkout@v6
             - uses: ./.github/actions/setup-python
             - run: |
                   uv run pytest