Bump actions/checkout from 3 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

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

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

.github/workflows/publish.yml

@@ -13,7 +13,7 @@ jobs:
     outputs:
       version: ${{ steps.version.outputs.version }}
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - id: version
       shell: bash
       run: |
@@ -43,7 +43,7 @@ jobs:
     needs: [test, version]
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: dtolnay/rust-toolchain@stable
     - name: Dry-run package creation
       # Can't verify test-log for it may depend on yet-to-be-published