FIX: build warnings

Author: mmcky

.github/workflows/ci.yml

@@ -64,7 +64,7 @@ jobs:
         shell: bash -l {0}
         run: |
           rm -r _build/.doctrees
-          jb build lectures --path-output ./ -W --keep-going
+          jb build lectures --path-output ./ -nW --keep-going
       - name: Upload Execution Reports (HTML)
         uses: actions/upload-artifact@v2
         if: failure()

lectures/_toc.yml

@@ -14,6 +14,7 @@ parts:
   - file: intro_supply_demand
   - file: supply_demand_multiple_goods
   - file: supply_demand_heterogeneity
+  - file: input_output
 - caption: Tools & Techniques
   numbered: true
   chapters: