fix(bukkit): 修复gson重复键问题

- 使用最后一个

bukkit/src/main/java/net/momirealms/craftengine/bukkit/block/BukkitBlockManager.java

@@ -308,7 +308,7 @@ public class BukkitBlockManager extends AbstractBlockManager {
                 }
             }
 
-            this.soundMapper = soundMapperBuilder.build();
+            this.soundMapper = soundMapperBuilder.buildKeepingLast();
         } catch (Throwable e) {
             plugin.logger().warn("Failed to inject blocks.", e);
         }