add in cached _build folder due to plotly bug (#86)

Author: mmcky

.github/workflows/publish.yml

@@ -36,6 +36,13 @@ jobs:
       - name: Display Pip Versions
         shell: bash -l {0}
         run: pip list
+      - name: Download "build" folder (cache)
+        uses: dawidd6/action-download-artifact@v2
+        with:
+          workflow: cache.yml
+          branch: main
+          name: build-cache
+          path: _build
       # Build Assets (Download Notebooks and PDF via LaTeX)
       # - name: Build PDF from LaTeX
       #   shell: bash -l {0}