spelling fix

smash/web/templates/appointments/index.html

@@ -118,7 +118,7 @@
                 eventRender: function (event, element) {
                     var content = "<ul>";
                     if (event.phone_number) {
-                        content += '<li>Phone number: ' + event.phone_number + '</li>'
+                        content += '<li>Phone numbers: ' + event.phone_number + '</li>'
                     }
                     if (event.screening_number) {
                         content += '<li>Screening number: ' + event.screening_number + '</li>'