chore: Update variable for award year in group leader citations edit …

…page

Signed-off-by: Louis Kirkham <louis.kirkham@bitzesty.com>

app/views/group_leader/citations/edit.html.slim

@@ -10,7 +10,7 @@
         legend.govuk-fieldset__legend.govuk-fieldset__legend--m
           h1.govuk-fieldset__heading
             | Do you accept the King's Award for Voluntary Service (KAVS)
-            =<> AwardYear.current.year
+            =<> @award_year.year
             | on behalf of your group?
         .govuk-radios.govuk-radios--inline
           .govuk-radios__item