Bump actions/upload-artifact from 5 to 6 (#119)

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 5 to 6.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v5...v6)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '6'
  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/release-wheels.yml

@@ -29,7 +29,7 @@ jobs:
         poetry build -f sdist
 
     - name: Store artifacts
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
         name: sdist
         path: ./dist
@@ -182,7 +182,7 @@ jobs:
         python -m cibuildwheel --output-dir dist
 
     - name: Store artifacts
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
         name: wheel-${{ matrix.python }}-${{ matrix.platform_id }}
         path: ./dist
@@ -236,7 +236,7 @@ jobs:
         python -m cibuildwheel --output-dir dist
 
     - name: Store artifacts
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
         name: wheel-${{ matrix.python }}-${{ matrix.platform_id }}
         path: ./dist/*.whl