Mention specific version in rc2 notes

Author: reivilibre

CHANGES.md

@@ -16,7 +16,7 @@ If you require your homeserver to verify e-mail addresses or to support password
 Synapse 1.64.0rc2 (2022-07-29)
 ==============================
 
-This RC reintroduces support for `account_threepid_delegates.email`, which was removed in 1.64.0rc1. It remains deprecated and will be removed altogether in a future release. ([\#13406](https://github.com/matrix-org/synapse/issues/13406))
+This RC reintroduces support for `account_threepid_delegates.email`, which was removed in 1.64.0rc1. It remains deprecated and will be removed altogether in Synapse v1.66.0. ([\#13406](https://github.com/matrix-org/synapse/issues/13406))
 
 
 Synapse 1.64.0rc1 (2022-07-26)