Modify docker-restart.1.md

Signed-off-by: zhouhao <zhouhao@cn.fujitsu.com>

man/docker-restart.1.md

@@ -2,7 +2,7 @@
 % Docker Community
 % JUNE 2014
 # NAME
-docker-restart - Restart a container
+docker-restart - Restart one or more containers
 
 # SYNOPSIS
 **docker restart**