Send a message in Hub discussion after Parquet conversion
fixes #1270.

Implements https://github.com/huggingface/datasets-server/issues/1270#issuecomment-1726384167
Send a message in Hub discussion after Parquet conversion: fixes #1270.

Implements https://github.com/huggingface/datasets-server/issues/1270#issuecomment-1726384167