small tinks

.github/workflows/notebook-testing.yml

@@ -17,14 +17,14 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Set up Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v5
         with:
           python-version: "3.8"
 
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip  
-          pip install nbconvert nbclient  
+          pip install nbconvert nbclient ipykernel
 
       - name: Run Jupyter Notebooks
         run: |