TCF (0.9.0): add changelog

[maryiaLichko]

Product: TCF
Since: 0.9.0
Root document: https://www.tarantool.io/en/clustersfederation/doc/latest/releases/#doc-releases
SME: @ DifferentialOrange @ themilchenko @ Руслан Галиев

MR https://gitlab.corp.mail.ru/tarantool/tcf/clusters-federation/-/merge_requests/49