website/ru: Update releases/15.0R/errata.adoc
Update to the latest EN revision:
releases/15.0R/errata.adoc (4faf0e7a8a20a7ddda25d965e68587401dbf8f79)
Reviewed by: maxim (mentor), marck, vladlen
Differential Revision: https://reviews.freebsd.org/D54690