add bcc emails config

app/views/submitter_mailer/completed_email.html.erb

@@ -1,7 +1,7 @@
 <% if @email_config %>
   <%= auto_link(simple_format(h(ReplaceEmailVariables.call(@email_config.value['body'], submitter: @submitter)))) %>
 <% else %>
-  <p>Hi <%= @user.first_name %>,</p>
+  <p>Hi there,</p>
   <p><%= @submitter.email %> has completed the "<%= @submitter.submission.template.name %>" form.</p>
   <p><%= link_to 'View Submission', submission_url(@submitter.submission) %></p>
 <% end %>