Bump actions/upload-artifact from 3 to 4 (#8)

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 3 to 4.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v3...v4)

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

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

Author: dependabot[bot]

.github/workflows/ci.yaml

@@ -48,7 +48,7 @@ jobs:
           fail_ci_if_error: true
           files: .coverage.${{ steps.pyenv.outputs.value }}.xml
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         if: matrix.python-version == '2.7' || matrix.python-version == '3.8'
         with:
           name: dist-${{ matrix.python-version }}