Always export notebooks in deploy workflow

Remove the prior step that checked whether files under notebooks/ changed and the dependent conditional on the Export notebooks step. The export step now runs unconditionally (no steps.changed usage), simplifying the workflow and ensuring notebooks are exported on all relevant workflow runs.

Author: kenyiu

.github/workflows/deploy.yml

@@ -20,15 +20,7 @@ jobs:
       - name: Install Python deps
         run: uv sync
 
-      - name: Check if notebooks changed
-        id: changed
-        run: |
-          git diff --name-only HEAD~1 HEAD 2>/dev/null | grep -q '^notebooks/' \
-            && echo "notebooks=true" >> $GITHUB_OUTPUT \
-            || echo "notebooks=false" >> $GITHUB_OUTPUT
-
       - name: Export notebooks
-        if: steps.changed.outputs.notebooks == 'true' || github.event_name != 'push'
         env:
           OSO_API_KEY: ${{ secrets.OSO_API_KEY }}
         run: uv run python scripts/export_notebooks.py