circleci use python3 instead of python to get pip

.circleci/config.yml

@@ -81,7 +81,7 @@ aliases:
           name: "setup python"
           command: |
             curl https://bootstrap.pypa.io/2.7/get-pip.py -o get-pip.py
-            python get-pip.py pip==21.0.1
+            python3 get-pip.py pip==21.0.1
             pip install s3cmd==2.1.0
       - run:
           name: "deploy to staging"