chore(deps): update actions/download-artifact action to v5

Author: renovate[bot]

.github/workflows/ci.yaml

@@ -162,7 +162,7 @@ jobs:
         python-version: '3.14'
 
     - name: Download build artifacts
-      uses: actions/download-artifact@v4
+      uses: actions/download-artifact@v5
       with:
         name: dist-${{ github.sha }}
         path: dist/