yapf fix

tools/run_tests/sanity/check_qps_scenario_changes.py

@@ -28,6 +28,6 @@ json_run_localhost_bzl = 'test/cpp/qps/json_run_localhost_scenarios.bzl'
 
 if qps_json_driver_bzl in output or json_run_localhost_bzl in output:
     print('qps benchmark scenarios have been updated, please commit '
-        'test/cpp/qps/qps_json_driver_scenarios.bzl and/or '
-        'test/cpp/qps/json_run_localhost_scenarios.bzl')
+          'test/cpp/qps/qps_json_driver_scenarios.bzl and/or '
+          'test/cpp/qps/json_run_localhost_scenarios.bzl')
     sys.exit(1)