fix: update dockerized-test.yml

Author: maxday

.github/workflows/dockerized-test.yml

@@ -33,6 +33,11 @@ jobs:
     - name: Build the image
       run: docker build . -t local/test -f Dockerfile.test --build-arg BASE_IMAGE=public.ecr.aws/lambda/ruby:${{ matrix.ruby_version }}
 
+    - name: Set up Python 3.11
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.11'
+    
     - name: Run tests
       uses: aws/containerized-test-runner-for-aws-lambda@main
       with: