Fix important information for volunteers

Signed-off-by: Emmy D'Anello <emmy.danello@animath.fr>

registration/models.py

@@ -518,8 +518,8 @@ class VolunteerRegistration(Registration):
                 text = _("<p>The draw of the solutions for the tournament {tournament} is planned on the "
                          "{date:%Y-%m-%d %H:%M}. You can join it on <a href='{url}'>this link</a>.</p>")
                 url = reverse_lazy("draw:index")
-                content = format_lazy(text, tournament=self.tournament.name,
-                                      date=localtime(self.tournament.solutions_draw),
+                content = format_lazy(text, tournament=tournament.name,
+                                      date=localtime(tournament.solutions_draw),
                                       url=url)
                 informations.append({
                     'title': _("Draw of solutions"),