fix mail template use erb for plain

app/views/form_mailer/received.text.erb

@@ -0,0 +1,18 @@
+Hello <%= @data['name'] %>
+
+This is an automated message confirming that we have receievd your request
+
+Your form input is listed below. If you need to amend or correct, you may reply
+to this email.
+
+You will hear from us in the next few days
+
+Your friendly Feenix Bot
+
+
+Data received
+-------------
+
+<%- @data.each do |name , value| %>
+  <%= name %> : <%= value %>
+<%- end %>