etcd.conf.yml: change "log-output" type
@@ -138,7 +138,7 @@ debug: false
log-package-levels:
# Specify 'stdout' or 'stderr' to skip journald logging even when running under systemd.
-log-output: default
+log-output: [default]
# Force to create a new one member cluster.
force-new-cluster: false
