Bump actions/upload-artifact from 6 to 7 (#29)

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Author: dependabot[bot]

.github/workflows/release.yml

@@ -26,7 +26,7 @@ jobs:
       run: uv build
 
     - name: Upload artifacts
-      uses: actions/upload-artifact@v6
+      uses: actions/upload-artifact@v7
       with:
         name: release-dists
         path: dist/