Bump actions/checkout from 5.0.1 to 6.0.0

Bumps [actions/checkout](https://github.com/actions/checkout) from 5.0.1 to 6.0.0.
- [Release notes](https://github.com/actions/checkout/releases)
- [Commits](actions/checkout@v5.0.1...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/wheel-builder.yml

@@ -25,7 +25,7 @@ jobs:
     runs-on: ubuntu-latest
     name: sdists
     steps:
-      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v4.2.2
+      - uses: actions/checkout@c2d88d3ecc89a9ef08eebf45d9637801dcee7eb5 # v4.2.2
         with:
           # The tag to build or the tag received by the tag event
           ref: ${{ github.event.inputs.version || github.ref }}
@@ -168,7 +168,7 @@ jobs:
             BIN_PATH: '/Library/Frameworks/PythonT.framework/Versions/3.14/bin/python3.14t'
     name: "Python ${{ matrix.PYTHON.VERSION }} ${{ matrix.PYTHON.ABI_VERSION }} on macOS"
     steps:
-      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v4.2.2
+      - uses: actions/checkout@c2d88d3ecc89a9ef08eebf45d9637801dcee7eb5 # v4.2.2
         with:
           # The tag to build or the tag received by the tag event
           ref: ${{ github.event.inputs.version || github.ref }}