fix: typo in the credentials page

app/views/credentials/_form.html.haml

@@ -38,7 +38,7 @@
         = f.select :hold, [["Process all messages", false], ["Hold messages from this credential", true]], {}, :class => 'input input--select'
         %p.fieldSet__text
           You may wish to automatically hold all messages that are sent by this credential. This allows you to preview them
-          for they are delivered to their recipients. This is useful for credentials for development environments.
+          before they are delivered to their recipients. This is useful for credentials for development environments.
 
   .fieldSetSubmit.buttonSet
     = f.submit @credential.new_record? ? "Create credential" : "Save credential", :class => 'button button--positive js-form-submit'