build(deps): bump actions/upload-artifact from 4 to 6 (#507)

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4 to 6.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v4...v6)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Alexey Kazakov <alkazako@redhat.com>

Author: dependabot[bot]

.github/workflows/test-with-coverage.yml

@@ -23,7 +23,7 @@ jobs:
           make test-with-coverage
 
       - name: Upload coverage artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: coverage
           path: ./build/_output/coverage/coverage.txt