Edit link in a discussion

Hello

If I create a discussion with a link, can I then change the link? When I try to edit the post I can only change my comment, but not the link itself. I found out I can publish Google Drive in a fancy read-only mode, so I would change the link with the new one. The new link is https://docs.google.com/spreadsheets/d/1cWGhf1ZhpTB7MAaYBz-uCGBt8YzuBwv_jnCrE-8Nc60/pubhtml#

Thank you! ^^