Modify docs for conditional workflow (#2117)
Modify docs for conditional workflow (#2117)

* Modify documentation for Conditional workflow.

* modify doc

HappyRay/azkaban,chengren311/azkaban,azkaban/azkaban,HappyRay/azkaban,chengren311/azkaban,azkaban/azkaban,chengren311/azkaban,HappyRay/azkaban,chengren311/azkaban,azkaban/azkaban,HappyRay/azkaban,chengren311/azkaban,HappyRay/azkaban,HappyRay/azkaban,azkaban/azkaban,azkaban/azkaban,azkaban/azkaban