Milestone for the 2.56.0 release, for GNOME 44.

Release schedule: https://wiki.gnome.org/FortyFour

• February 11 (Sat) - beta tarballs due; API freeze
• March 04 (Sat) - RC tarballs due, code freeze
• March 18 (Sat) - GNOME 44.0 newstable tarballs due