fix source param in Cascaded Data Transmission#825

CritasWang merged 2 commits intoapache:mainapache/iotdb-docs:mainfrom

leto-b:fix-data-sync-param-source-mode.double-living-in-table-modelleto-b/iotdb-docs:fix-data-sync-param-source-mode.double-living-in-table-modelCopy head branch name to clipboard