Bump actions/checkout

Bumps [actions/checkout](https://github.com/actions/checkout) from 3df4ab11eba7bda6032a0b82a6bb43b11571feac to b4ffde65f46336ab88eb53be808477a3936bae11.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@3df4ab1...b4ffde6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
...

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

.github/workflows/main.yml

@@ -28,7 +28,7 @@ jobs:
           toxenv: pre-commit
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
+    - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
     - uses: actions/setup-python@0a5c61591373683505ea898e09a3ea4f39ef2b9c # v5
       with:
         python-version: ${{ matrix.python }}