Chore: Fix airflow tests (#4063)

Author: erindru

.circleci/continue_config.yml

@@ -157,8 +157,11 @@ jobs:
           name: Install envsubst
           command: sudo apt-get update && sudo apt-get install gettext-base
       - run:
-          name: Install ruamel.yaml
-          command: pip3 install ruamel.yaml==0.16.0
+          name: Setup python env
+          command: |
+            pip3 install --upgrade pip
+            pip3 install ruamel.yaml==0.16.0
+            python3 --version
       - run:
           name: Run Airflow slow tests
           command: make airflow-docker-test-with-env