Do not refer to the course page as a menu (#655)

Author: mdjnelson

lang/en/customcert.php

@@ -205,7 +205,7 @@
 $string['requiredtimenotmet'] = 'You must spend at least a minimum of {$a->requiredtime} minutes in the course before you can access this certificate.';
 $string['returncourse'] = 'Return to course button';
 $string['returncourse_desc'] = 'Display a "Return to course" button on the view certificate page.';
-$string['returncourselabel'] = 'Return to course menu';
+$string['returncourselabel'] = 'Return to course page';
 $string['rightmargin'] = 'Right margin';
 $string['rightmargin_help'] = 'This is the right margin of the certificate PDF in mm.';
 $string['save'] = 'Save';