docs: update release notes

Author: ellemouton

Diff for: docs/release-notes/release-notes-0.19.0.md

@@ -321,8 +321,11 @@ The underlying functionality between those two options remain the same.
     - [Abstract autopilot access](https://github.com/lightningnetwork/lnd/pull/9480)
     - [Abstract invoicerpc server access](https://github.com/lightningnetwork/lnd/pull/9516)
     - [Refactor to hide DB transactions](https://github.com/lightningnetwork/lnd/pull/9513)
-    - Move the [graph cache out of the graph 
+    - Move the [graph cache out of the graph
       CRUD](https://github.com/lightningnetwork/lnd/pull/9544) layer.
+    - Move [topology
+      subscription](https://github.com/lightningnetwork/lnd/pull/9577) and
+      notification handling from the graph.Builder to the ChannelGraph.
 
 * [Golang was updated to
   `v1.22.11`](https://github.com/lightningnetwork/lnd/pull/9462).