fix swapped stdout/stderr name in runner

Author: yumkam

ydb/library/benchmarks/runner/runner/runner.py

@@ -19,7 +19,7 @@ def time_ns():
 RE_DIGITS = re.compile(r'([0-9]+)')
 
 
-def run(argv, err, out):
+def run(argv, out, err):
 
     start_time = time_ns()
     pid = os.posix_spawn(argv[0], argv, {}, file_actions=(