MDL-28192 local_qeupgradehelper fix typo.

local/qeupgradehelper/lang/en/local_qeupgradehelper.php

@@ -56,7 +56,7 @@
 $string['listtodo_desc'] = 'This will show a report of all the quizzes on the system (if any) that have attempts that still need to be upgraded to the new question engine.';
 $string['listtodointro'] = 'These are all the quizzes with attempt data that still needs to be converted. You can convert the attempts by clicking the link.';
 $string['listupgraded'] = 'List already upgrade quizzes that can be reset';
-$string['listupgraded_desc'] = 'This will show a report of all the quizzes on the system whose attepmts have been upgraded, and where the old data is still present so the upgrade could be reset and redone.';
+$string['listupgraded_desc'] = 'This will show a report of all the quizzes on the system whose attempts have been upgraded, and where the old data is still present so the upgrade could be reset and redone.';
 $string['listupgradedintro'] = 'These are all the quizzes that have attempts that were upgraded, and where the old attempt data is so there, so they could be reset, and the upgrade re-done.';
 $string['noquizattempts'] = 'Your site does not have any quiz attempts at all!';
 $string['nothingupgradedyet'] = 'No upgraded attempts that can be reset';