Bump actions/upload-artifact from 3 to 4

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] <support@github.com>

.github/workflows/test.yml

@@ -40,7 +40,7 @@ jobs:
       - name: Test frontend
         run: docker-compose run --no-deps web yarn test:js:coverage
       - name: Upload coverage artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: frontend-coverage
           path: |
@@ -66,7 +66,7 @@ jobs:
           -e DB_ENCRYPTION_KEY=MMkDMBfYL0Xoz3Xu1ENs3AkdCZdJoks5PNlUBkK7KDc=
           web yarn test:py
       - name: Upload coverage artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: backend-coverage
           path: |