Bump actions/upload-artifact from 5 to 6 in /.github/workflows (#175)

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Author: dependabot[bot]

.github/workflows/publish.yml

@@ -70,7 +70,7 @@ jobs:
       - uses: astral-sh/setup-uv@v7
       - run: uv pip install --system --no-cache build
       - run: python -m build
-      - uses: actions/upload-artifact@v5
+      - uses: actions/upload-artifact@v6
         with:
           name: dist
           path: dist/