Ensure only people allowed to see the poll can actually vote (mastodon#10161)

Author: ClearlyClaire

app/policies/poll_policy.rb

@@ -2,6 +2,6 @@
 
 class PollPolicy < ApplicationPolicy
   def vote?
-    !current_account.blocking?(record.account) && !record.account.blocking?(current_account)
+    StatusPolicy.new(current_account, record.status).show? && !current_account.blocking?(record.account) && !record.account.blocking?(current_account)
   end
 end