The meaning of the increment field used in the "sequenceHandlerType=1" global sequence needs to be explained in the document

这个increment字段指的不是每个id会间隔多少，而是每多少个id，再去取一批新的id用来分配
[文档](https://actiontech.github.io/dble-docs-cn/history/develop/1.config_file/1.7_global_sequence/1.7.1_MySQL-offset-setp.html)
或添加超链接到 https://github.com/actiontech/dble/discussions/2945