Fix typo in var translation.

lang/en/attendance.php

@@ -158,7 +158,7 @@ $string['emailcontent_help'] = 'When a warning is sent to a student, it takes th
 <li>%numtakensessions%</li>
 <li>%points%</li>
 <li>%maxpoints%</li>
-<li>%precent%</li>
+<li>%percent%</li>
 </ul>';
 
 $string['emailsubject'] = 'Email subject';

locallib.php

@@ -804,7 +804,7 @@ function attendance_template_variables($record) {
         '/%numtakensessions%/' => $record->numtakensessions,
         '/%points%/' => $record->points,
         '/%maxpoints%/' => $record->maxpoints,
-        '/%precent%/' => $record->percent,
+        '/%percent%/' => $record->percent,
     );
     $extrauserfields = get_all_user_name_fields();
     foreach ($extrauserfields as $extra) {