Add events attending to the dashboard haml

Signed-off-by: jonathan.kerr <[email protected]>

Author: jonodrew

app/views/dashboard/dashboard.html.haml

@@ -32,4 +32,4 @@
           There are no upcoming events announced for the chapters you are subscribed to.
         - @ordered_events.each do |date, workshops|
           %h4= date
-          = render workshops
+          = render workshops, attending_ids: @attending_ids