update python version for new Ubuntu 24 default (#1556)

Author: alisaduncan

.github/workflows/test-and-deploy.yml

@@ -29,7 +29,7 @@ jobs:
     - name: Set up python and pip
       uses: actions/setup-python@v4
       with:
-        python-version: 3.7
+        python-version: 3.9
         architecture: x64
 
     - name: Install AWS CLI