Update README.MD

SoftEther/README.MD

@@ -17,8 +17,7 @@ bash <(wget --no-check-certificate --no-cache -4 -qO- "https://raw.githubusercon
 
 ## Usage
 ```
-Usage:
-        bash SoftEther.sh -a [AdminPasswd] -u [User] -p [Passwd]
+bash SoftEther.sh -a [AdminPasswd] -u [User] -p [Passwd]
 ```
 
 ## Network