The WaPo article says the Jan 6 prisoners are staying put. Others are being moved.
https://www.washingtonpost.com/local/public-safety/dc-jail-inmates-transferred/2021/11/02/b5255388-3be8-11ec-bfad-8283439871ec_story.html
They’re just moving out the common criminals from the DC area, as far as I can see. Not the Jan 6th folks.