Fix documentation of the `print` command

The documentation of the `print` command still refers to the plugin
name as "helloworld".  Change it to "cookbook-plugin".

Change-Id: I67db42368719825669cc5a37026930d388147313
diff --git a/src/main/resources/Documentation/cmd-print.md b/src/main/resources/Documentation/cmd-print.md
index ae05e74..fb0c1b9 100644
--- a/src/main/resources/Documentation/cmd-print.md
+++ b/src/main/resources/Documentation/cmd-print.md
@@ -1,13 +1,13 @@
-helloworld print
-================
+cookbook-plugin print
+=====================
 
 NAME
 ----
-helloworld print - Print our helloworld message
+cookbook-plugin print - Print our "Hello world" message
 
 SYNOPSIS
 --------
->     ssh -p <port> <host> helloworld print
+>     ssh -p <port> <host> cookbook-plugin print
 >      [--french]
 >      [name]
 
@@ -42,15 +42,15 @@
 
 Have the server say hi to the world.
 
->     $ ssh -p 29418 review.example.com helloworld print
+>     $ ssh -p 29418 review.example.com cookbook-plugin print
 
 Have the server say hi to the world in French.
 
->     $ ssh -p 29418 review.example.com helloworld print --french
+>     $ ssh -p 29418 review.example.com cookbook-plugin print --french
 
 Have the server say hi to you in French.
 
->     $ ssh -p 29418 review.example.com helloworld print --french \'Revi Ewer\'
+>     $ ssh -p 29418 review.example.com cookbook-plugin print --french \'Revi Ewer\'
 
 SEE ALSO
 --------