fix undefined method 'fitered_params' for #<ActionDispatch::Request>

Author: jinzhu

lib/exception_notifier/views/exception_notifier/_request.text.erb

@@ -1,4 +1,4 @@
 * URL       : <%= raw @request.url %>
 * IP address: <%= raw @request.remote_ip %>
-* Parameters: <%= raw @request.fitered_params.inspect %>
+* Parameters: <%= raw @request.filtered_parameters.inspect %>
 * Rails root: <%= raw Rails.root %>