r366954 | gjb | 2020-10-23 09:00:52 +0900 (2020/10/23 (金)) | 8 lines

- Switch releng/12.2 from RC3 to RELEASE.
- Add the anticipated 12.2-RELEASE date to UPDATING. Fix
a missing colon in the previous UPDATING entry while here.
- Set a static __FreeBSD_version.