fix: send pre-SE bulk order cooldown message to the player (#2620)

When a player selects Bulk Order Info while a cooldown is active on a pre-SE server, the vendor sends localized message 1049039 to itself instead of the requesting player. The player therefore receives no cooldown response.

Change the recipient from `vendor` to `from`, matching the SE branch. Cooldown durations and bulk-order eligibility remain unchanged.

Validation: This one-line fix compiled successfully in our customized 0.15.6.145 server build with zero warnings or errors. The current upstream main branch was not built locally.

Projects/UOContent/Mobiles/Vendors/BaseVendor.cs

@@ -1409,7 +1409,7 @@ namespace Server.Mobiles
                     else
                     {
                         // An offer may be available in about ~1_hours~ hours.
-                        vendor.SayTo(vendor, 1049039, $"{Math.Ceiling(totalSeconds / 3600):F0}");
+                        vendor.SayTo(from, 1049039, $"{Math.Ceiling(totalSeconds / 3600):F0}");
                     }
 
                     vendor.SpeechHue = oldSpeechHue;