Bump actions/upload-artifact from 3 to 4 (#187)

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>

.github/workflows/CI.yml

@@ -85,7 +85,7 @@ jobs:
       - shell: bash
         run: |
           cp ./lcov.info ./lcov-${{ matrix.version }}-${{ github.run_id }}.info
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           name: lcov-${{ matrix.version }}-${{ github.run_id }}
           path: ./lcov-${{ matrix.version }}-${{ github.run_id }}.info
@@ -132,7 +132,7 @@ jobs:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           path-to-lcov: ./lcov.info
       # Upload merged coverage data as artifact for debugging
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           name: lcov
           path: ./lcov.info