fix template

templates/config.alloy.erb

@@ -97,7 +97,7 @@ prometheus.remote_write "prometheus" {
     queue_config {
       max_shards           = <%= @ay_prom_max_shards %>
       max_samples_per_send = <%= @ay_prom_max_samples_per_send %>
-      batch_send_deadline  = <%= @ay_prom_batch_send_deadline %>
+      batch_send_deadline  = "<%= @ay_prom_batch_send_deadline %>"
     }
   }
 }