fix(ball-common): 修复获取玩家缓存消息时的报错

ball-common/src/main/java/cn/hamster3/mc/plugin/ball/common/api/BallAPI.java

@@ -682,7 +682,7 @@ public abstract class BallAPI {
             statement.setString(1, uuid.toString());
             ResultSet set = statement.executeQuery();
             while (set.next()) {
-                DisplayMessage msg = CoreUtils.GSON.fromJson(set.getString("msg"), DisplayMessage.class);
+                DisplayMessage msg = CoreUtils.GSON.fromJson(set.getString("message"), DisplayMessage.class);
                 list.add(msg);
             }
             statement.close();