npm init help wrong command

PR-URL: #1162
Credit: @mum-never-proud
Close: #1162
Reviewed-by: @ruyadorno

Author: mum-never-proud

lib/init.js

@@ -63,7 +63,7 @@ function init (args, cb) {
       'This utility will walk you through creating a package.json file.',
       'It only covers the most common items, and tries to guess sensible defaults.',
       '',
-      'See `npm help json` for definitive documentation on these fields',
+      'See `npm help init` for definitive documentation on these fields',
       'and exactly what they do.',
       '',
       'Use `npm install <pkg>` afterwards to install a package and',