Update README.md

README.md

-[货宝宝基本计算规则](http://lab.hbbyun.com/businessdoc/hbbdoc/wikis/%E5%9F%BA%E6%9C%AC%E8%AE%A1%E7%AE%97%E5%85%AC%E5%BC%8F)
+- [货宝宝基本计算规则](http://lab.hbbyun.com/businessdoc/hbbdoc/wikis/%E5%9F%BA%E6%9C%AC%E8%AE%A1%E7%AE%97%E5%85%AC%E5%BC%8F)
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+- [销售单据信息处理规则](http://lab.hbbyun.com/businessdoc/hbbdoc/wikis/%E9%94%80%E5%94%AE%E5%8D%95%E6%8D%AE%E4%BF%A1%E6%81%AF%E5%A4%84%E7%90%86%E8%A7%84%E5%88%99)