Add plugin missing word, we generate not a button, we generate a plugin (#180)

Author: LOBsTerr

translations/generate.plugin.ckeditorbutton.yml

@@ -16,7 +16,7 @@ questions:
   button-name: 'Enter the button name. NOTE: This corresponds to the CKEditor button name. They are the first argument of the editor.ui.addButton() or editor.ui.addRichCombo() functions in the plugin.js file.'
   button-icon-path: 'Enter the button icon path'
 examples:
-  - description: 'Generate CKEditor button specifying the module name, the class, the label, its id, the button name and the icon path'
+  - description: 'Generate plugin CKEditor button specifying the module name, the class, the label, its id, the button name and the icon path'
     execution: |
       drupal generate:plugin:ckeditorbutton  \
         --module="modulename"  \