Bump actions/upload-artifact from 5.0.0 to 6.0.0

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 5.0.0 to 6.0.0.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v5.0.0...v6.0.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -110,7 +110,7 @@ jobs:
 
     - name: Store Coverage Data
       if: always() && contains('success,failure', steps.test.outcome)
-      uses: actions/upload-artifact@v5.0.0
+      uses: actions/upload-artifact@v6.0.0
       with:
         name: coverage-data-${{ matrix.platform }}-${{ matrix.python-version }}
         path: ".coverage.*"
@@ -167,7 +167,7 @@ jobs:
 
     - name: Upload Project Coverage HTML Report
       if: always() && steps.project-coverage.outcome == 'failure'
-      uses: actions/upload-artifact@v5.0.0
+      uses: actions/upload-artifact@v6.0.0
       with:
         name: html-coverage-report-project
         path: htmlcov