ci(deps): bump actions/upload-artifact from 4 to 5 (#12)

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4 to 5.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v4...v5)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '5'
  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>

Author: dependabot[bot]

.github/workflows/publish.yml

@@ -30,7 +30,7 @@ jobs:
         run: python -m build
 
       - name: Store distribution packages
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: python-package-distributions
           path: dist/

.github/workflows/test.yml

@@ -34,7 +34,7 @@ jobs:
         run: uv run pytest --cov=toon_format --cov-report=xml --cov-report=term --cov-report=html --cov-fail-under=85
 
       - name: Upload coverage reports as artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         if: matrix.python-version == '3.12'
         with:
           name: coverage-reports