Fix(example): methods cors on restful-tasks edge (#20128)

Co-authored-by: Charis <26616127+charislam@users.noreply.github.com>

examples/edge-functions/supabase/functions/restful-tasks/index.ts

@@ -7,6 +7,7 @@ import { createClient, SupabaseClient } from 'https://esm.sh/@supabase/supabase-
 const corsHeaders = {
   'Access-Control-Allow-Origin': '*',
   'Access-Control-Allow-Headers': 'authorization, x-client-info, apikey',
+  'Access-Control-Allow-Methods': 'POST, GET, OPTIONS, PUT, DELETE',
 }
 
 interface Task {