update documentation

Author: web-flow

docs/lnd/release-notes/release-notes-0.19.0.md

@@ -82,6 +82,9 @@
   could lead to our ChannelUpdate rate limiting logic being prematurely 
   triggered.
 
+* [Fixed a bug](https://github.com/lightningnetwork/lnd/pull/9595) where the
+  initial graph sync query may be failed due to inconsistent state.
+
 # New Features
 
 * [Support](https://github.com/lightningnetwork/lnd/pull/8390) for