Workshop attire for women in India?
This is out of my field as I’m male, but think of the temperature, so next be respectful (not suggesting you wouldn’t...) but a lightweight business suit may be the order of the day.

Any images of last years conference available - may give you a hint...

I don’t think you will be required to wear a sari ... Mind you a colleague went to a conference abroad and made some friends and they went shopping to get her some national dress as a memento .... and some light fun of course.