Bump actions/upload-artifact from 6.0.0 to 7.0.0

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 6.0.0 to 7.0.0.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v6.0.0...v7.0.0)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: 7.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/pythonpackage.yml

@@ -65,7 +65,7 @@ jobs:
         run: |
           pytest --cov=devolo_plc_api --cov-report=xml
       - name: Preserve coverage
-        uses: actions/upload-artifact@v6.0.0
+        uses: actions/upload-artifact@v7.0.0
         if: matrix.python-version == '3.9'
         with:
           name: coverage