chore(deps): bump actions/checkout from 5 to 6 (#1364)

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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/benchmark.yml

@@ -87,7 +87,7 @@ jobs:
 
     
     - name: Checkout toqito repository at the current/mentioned commit
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         path: toqito
         ref: ${{ steps.defaults.outputs.target_ref }}
@@ -114,7 +114,7 @@ jobs:
         echo "================================"
     
     - name: Checkout toqito-bench repository  
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         repository: vprusso/toqito-bench
         path: toqito-bench

.github/workflows/build-test-actions.yml

@@ -26,7 +26,7 @@ jobs:
     env:
       PYTHON: ${{ matrix.python-version }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: astral-sh/ruff-action@v3
       - run: ruff check --fix
       - run: ruff format
@@ -58,7 +58,7 @@ jobs:
     env:
       PYTHON: ${{ matrix.python-version }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v6
         with:

.github/workflows/publish-release.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out toqito
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           ref: ${{ github.ref }} # only publish to PyPI on tag pushes
       - name: Set up Python