build(deps): bump actions/download-artifact from 4.3.0 to 6.0.0

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 4.3.0 to 6.0.0.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@d3f86a1...018cc2c)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: 6.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -229,7 +229,7 @@ jobs:
       run: sudo apt-get -y install lcov
 
     - name: Collect coverage reports
-      uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
+      uses: actions/download-artifact@018cc2cf5baa6db3ef3c5f8a56943fffe632ef53 # v6.0.0
       with:
         path: ./coverage