Tweak changelog formatting

CHANGES.md

@@ -5,9 +5,8 @@ No significant changes since 1.66.0rc2.
 
 This release removes the ability for homeservers to delegate email ownership
 verification and password reset confirmation to identity servers. This removal
-was originally planned for Synapse 1.64, but was later deferred until now.
-
-See the [upgrade notes](https://matrix-org.github.io/synapse/v1.66/upgrade.html#upgrading-to-v1660) for more details.
+was originally planned for Synapse 1.64, but was later deferred until now. See
+the [upgrade notes](https://matrix-org.github.io/synapse/v1.66/upgrade.html#upgrading-to-v1660) for more details.
 
 Deployments with multiple workers should note that the direct TCP replication
 configuration was deprecated in Synapse v1.18.0 and will be removed in Synapse
@@ -18,9 +17,8 @@ type) and the `worker_replication_port` config option will be removed .
 To migrate to Redis, add the [`redis` config](https://matrix-org.github.io/synapse/v1.66/workers.html#shared-configuration),
 then remove the TCP `replication` listener from config of the master and
 `worker_replication_port` from worker config. Note that a HTTP listener with a
-`replication` resource is still required.
-
-See the [worker documentation](https://matrix-org.github.io/synapse/v1.66/workers.html)
+`replication` resource is still required. See the
+[worker documentation](https://matrix-org.github.io/synapse/v1.66/workers.html)
 for more details.