Update help text to standard, as we have it in other commands (#181)

Author: LOBsTerr

translations/generate.entity.bundle.yml

@@ -1,5 +1,5 @@
 description: 'Generate a new content type (node / entity bundle)'
-help: 'Use: generate:contenttype <fancy> <Fancy> to create a new content type name with the machine name of fancy and the human-readable name of Fancy.'
+help: 'The <info>generate:contenttype</info> command helps you generate a new content type.'
 welcome: 'Welcome to the Drupal Content Type generator'
 options:
   module: 'The Module name.'