Bump actions/upload-artifact from 2.2.3 to 2.2.4 (#239)

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 2.2.3 to 2.2.4.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v2.2.3...v2.2.4)

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

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

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

Author: dependabot[bot]

.github/workflows/test.yml

@@ -31,7 +31,7 @@ jobs:
       - name: Test with tox
         run: tox
       - name: Upload coverage data
-        uses: "actions/[email protected].3"
+        uses: "actions/[email protected].4"
         with:
           name: coverage-data
           path: "coverage.xml"