Release Note - POS V74

The release note for POS features

Improvements / 功能改进

1.Improved the Combo Item feature by ensuring that clicking the '+' button correctly adds up to the set value in the back office./改进了组合项功能，确保在后台点击'+'按钮时，能够正确地将数量增加到设定值。

2.Added a shortcut operation on the POS to change item details./在POS上添加了一个快捷操作，用于更改商品详情。