Update .github/workflows/ci.yml

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: mmcky

.github/workflows/ci.yml

@@ -51,6 +51,7 @@ jobs:
           cp -u _build/jupyter/*.ipynb _build/html/_notebooks
       - name: Upload Execution Reports (Download Notebooks)
         uses: actions/upload-artifact@v4
+        if: failure()
         with:
           name: execution-reports-notebooks
           path: _build/jupyter/reports