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)