Update RELEASE.md

Author: nicoloboschi

RELEASE.md

@@ -5,7 +5,7 @@
 1. Move to the release version the following files:
 - `gradle.properties`: _version_ entry
 - `connector/src/main/resources/cassandra-source-version.properties`
-- `docs/antora.yml`: _version_ and _display_version_
+- `docs/docs-src/core/antora-cdc-cassandra.yml`: _version_ and _display_version_
 
 2. Add [release notes](https://github.com/datastax/cdc-apache-cassandra/blob/master/CDC_Release_Notes.md).