Update doc.yml

Temporarily manually update `mkdocs-jupyter` through `pip`

Author: cwognum

.github/workflows/doc.yml

@@ -31,7 +31,11 @@ jobs:
           cache-downloads: true
 
       - name: Install library
-        run: python -m pip install --no-deps .
+        run: |
+          python -m pip install --no-deps .
+          # Note: Temporarily upgrade mkdocs-jupyter through PyPi
+          # See https://github.com/conda-forge/mkdocs-jupyter-feedstock/pull/29
+          python -m pip install mkdocs-jupyter -U
 
       - name: Configure git
         run: |