Comment 11 for bug 1934997

I added a note to the SSSD docs at https://discourse.ubuntu.com/t/sssd-and-active-directory/27888 which will be live in ubuntu.com/server/docs shortly. I almost changed my mind, since the bug will eventually be fixed and then it won't be needed in the docs anymore. I'll remove the note again once this bug is fixed in 22.04.