typo (#919)

Author: ben-c-at-moz

taskcluster/kinds/new-beta-qa/kind.yml

@@ -44,7 +44,7 @@ tasks:
         pipenv run python -c 'from modules import testrail_integration as tri; tri.tc_reportable()' || exit 0;
         $FX_EXECUTABLE --version;
         . ./keyring-unlock.sh
-        pipenv run choose_ci_set.py;
+        pipenv run python choose_ci_set.py;
         pipenv run pytest --fx-executable $FX_EXECUTABLE $(cat selected_tests);
         export FAILURE=${?};
         mv ./ci_pyproject_headed.toml ./pyproject.toml;