Bump actions/upload-artifact from 6 to 7 (#418)

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 6 to 7.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v6...v7)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/python-cibuildwheel.yml

@@ -127,7 +127,7 @@ jobs:
         with:
           package-dir: python
 
-      - uses: actions/upload-artifact@v6
+      - uses: actions/upload-artifact@v7
         with:
           name: artifact-${{ matrix.os }}-${{ matrix.flavor }}-${{ matrix.target }}
           path: ./wheelhouse/*.whl
@@ -158,7 +158,7 @@ jobs:
         python -m pytest tests && \
         python -m pip uninstall -y keyvi
 
-    - uses: actions/upload-artifact@v6
+    - uses: actions/upload-artifact@v7
       with:
         name: artifact-sdist
         path: python/wheelhouse/*.tar.gz