update interpolation argument to pass link

update student invite page to pass link for updating dietary
restrictions rather than email address.

follow up to 17f5020 (had previously made this change for coach invites
but not students).

Author: mikej

app/views/invitation/_student.html.haml

@@ -4,4 +4,4 @@
   %p= t('workshop.virtual.invitation.shared_intro_3_html', email_link: mail_to(@workshop.chapter.email, @workshop.chapter.email))
 - else
   %p= t('workshop.invitation.student_intro_3_html')
-  %p= t('workshop.invitation.shared_intro_4_html', email_link: mail_to(@workshop.chapter.email, @workshop.chapter.email).html_safe)
+  %p= t('workshop.invitation.shared_intro_4_html', update_your_details_link: link_to(t('members.update_your_details_lower'), edit_member_path).html_safe)