Draft schedule for GNOME 41

Hi, I’ve posted a draft schedule for GNOME 41 with one significant change: the proposed schedule moves the 41.rc (previously .92) release to occur three weeks after 41.beta (previously .90) and two weeks before 41.0, rather than four weeks after beta and one week before .0. This means hard code freeze increases from one week to two weeks, allowing more time for testing the release candidate, and further discouraging last-minute changes. Our experience is that by the time distros have packaged the release candidate and users begin testing it, maintainers are already releasing .0 tarballs due to the short window between these milestones, and increasing from one week to two weeks should resolve that. The overall freeze period remains five weeks long, so total time for development is unchanged.

Feedback welcome!