update to latest docker container for all workflows

Author: mmcky

.github/workflows/cache.yml

@@ -7,7 +7,7 @@ jobs:
   cache:
     runs-on: quantecon-gpu
     container:
-      image: ghcr.io/quantecon/lecture-python-container:cuda-12.6.0-anaconda-2024-10-py312-b
+      image: ghcr.io/quantecon/lecture-python-container:cuda-12.8.1-anaconda-2024-10-py312
       options: --gpus all
     steps:
       - uses: actions/checkout@v4

.github/workflows/ci.yml

@@ -20,13 +20,13 @@ jobs:
       - name: Display Pip Versions
         shell: bash -l {0}
         run: pip list
-      # - name: Download "build" folder (cache)
-      #   uses: dawidd6/action-download-artifact@v8
-      #   with:
-      #     workflow: cache.yml
-      #     branch: main
-      #     name: build-cache
-      #     path: _build
+      - name: Download "build" folder (cache)
+        uses: dawidd6/action-download-artifact@v8
+        with:
+          workflow: cache.yml
+          branch: main
+          name: build-cache
+          path: _build
       # Build Assets (Download Notebooks and PDF via LaTeX)
       - name: Build Download Notebooks (sphinx-tojupyter)
         shell: bash -l {0}

.github/workflows/publish.yml

@@ -8,7 +8,7 @@ jobs:
     if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
     runs-on: quantecon-gpu
     container:
-      image: ghcr.io/quantecon/lecture-python-container:cuda-12.6.0-anaconda-2024-10-py312-b
+      image: ghcr.io/quantecon/lecture-python-container:cuda-12.8.1-anaconda-2024-10-py312
       options: --gpus all
     steps:
       - name: Checkout