configure action for ARC runner

.github/workflows/main.yml

@@ -10,9 +10,13 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
+        with:
+            python-version: '3.11.9' 
       - name: Install Dependencies
         run: pip install -r requirements.txt
       - name: test
-        run: pytest --nbval-lax *.ipynb
+        run: |
+             rm github-login.ipynb # exclude login from testing
+             pytest --nbval-lax *.ipynb
 #      - name: render
 #        run: myst build climate.md --pdf