Update details.html.erb (caveat emptor changed to be careful)

"Caveat emptor" changed to "Be careful".

app/views/request/details.html.erb

@@ -15,7 +15,7 @@
          'postal response and much more.', :site_name => site_name) %>
 </p>
 
-<p><%= _('<strong>Caveat emptor!</strong> To use this data in an honourable ' \
+<p><%= _('<strong>Be careful!</strong> To use this data in an honourable ' \
          'way, you will need a good internal knowledge of user behaviour on ' \
          '{{site_name}}. How, why and by whom requests are categorised is ' \
          'not straightforward, and there will be user error and ambiguity. ' \