fix: use all python3

Author: thomasrockhu-codecov

bitrise.yml

@@ -37,7 +37,7 @@ workflows:
           inputs:
             - content: |-
                 pip3 install -r app/requirements.txt
-                pytest ./app --cov app
+                python3 -m pytest ./app --cov app
       - path::./:
           title: Step Test
           run_if: true