Fabric API — [1.21.2] Fabric API 0.106.1+1.21.2

— Bump version (modmuss50)
— 1.21.2-rc1 (modmuss50)
— fix: Add operator tab to common group list and filter for visible tabs in getPageCount. (#4172) (Reece Mackie)
— Prevent vanilla clients from joining servers that require modded registry entries. (#4169) (modmuss, Patbox)