[AB-xxx] fixing issue of server id not being provided when manually creating a giveaway

abstracto-application/abstracto-modules/giveaway/giveaway-impl/src/main/java/dev/sheldan/abstracto/giveaway/command/GreateGiveaway.java

@@ -101,6 +101,7 @@ public class GreateGiveaway extends AbstractConditionableCommand {
                 .duration(duration)
                 .targetChannel(target)
                 .winnerCount(winners)
+                .serverId(creator.getGuild().getIdLong())
                 .title(title)
                 .build();