build(deps): bump the actions group with 2 updates

Bumps the actions group with 2 updates: [actions/upload-artifact](https://github.com/actions/upload-artifact) and [actions/download-artifact](https://github.com/actions/download-artifact).


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

Updates `actions/download-artifact` from 7 to 8
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v7...v8)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
- dependency-name: actions/download-artifact
  dependency-version: '8'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
...

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

Author: dependabot[bot]

.github/workflows/wheels.yml

@@ -33,7 +33,7 @@ jobs:
         uses: pypa/cibuildwheel@v3.3.1
         with:
           output-dir: wheelhouse
-      - uses: actions/upload-artifact@v6
+      - uses: actions/upload-artifact@v7
         with:
           name: cibw-wheels-${{ matrix.os }}
           path: ./wheelhouse/*.whl
@@ -49,7 +49,7 @@ jobs:
         run: source etc/make-libsemigroups.sh && sudo make install
       - name: Build SDist
         run: uv build --sdist
-      - uses: actions/upload-artifact@v6
+      - uses: actions/upload-artifact@v7
         with:
           name: sdist
           path: dist/*.tar.gz
@@ -73,7 +73,7 @@ jobs:
 
     steps:
       - name: Download wheels and sdist artifacts
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           # Here, we could specify a name of an artifact, or a pattern that
           # matches the names of artifacts. However, by not specifying these