It was always THIS naming scheme. Tradition.

- 14-CURRENT

- 14.1-STABLE

- 14.1-PRERELEASE

- 14.1-BETA1

- 14.1-BETA2

- 14.1-BETA3

- 14.1-BETAN

- 14.1-RC1

- 14.1-RC2

- 14.1-RC3

- 14.1-RCN

- 14.1-RELEASE

Details here:

- https://docs.freebsd.org/en/articles/freebsd-releng/

Hope that helps.