NOBUG: Fixed spelling mistake, kudos to Andrew for spotting it

lang/en/backup.php

@@ -46,7 +46,7 @@
 $string['backuptypecourse'] = 'Course';
 $string['backupversion'] = 'Backup version';
 $string['cannotfindassignablerole'] = 'The {$a} role in the backup file cannot be mapped to any of the roles that you are allowed to assign.';
-$string['choosefilefromcoursebackup'] = 'Choose an existing backup file from course bacup area';
+$string['choosefilefromcoursebackup'] = 'Choose an existing backup file from course backup area';
 $string['choosefilefromcoursebackup_help'] = 'When backup courses using default settings, backup files will be stored here';
 $string['choosefilefromuserbackup'] = 'Choose an existing backup file from private backup area';
 $string['choosefilefromuserbackup_help'] = 'When backup courses with "Anonymize user information" option ticked, backup files will be stored here';