Changes since RC 1:

• Exclude suspended cards from FSRS optimizing
• Select cancel button by default when exiting card layout screen
• Fix new cards from parent decks being gathered (#2907) (thanks to Rumo)
• Improve confirmation message in Add screen (#2903) (thanks to Abdo)
• Update to FSRS-4.5 (#2901) (thanks to Jarrett)

The complete changelog: https://github.com/ankitects/anki/releases/tag/23.12