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
1 file changed
tree: ee244a6fa173c6bd1a8f83eda9e1849fcd42a1d0
  1. src/
  2. .gitignore
  3. BUCK
  4. LICENSE
  5. pom.xml