docs: add release-notes

Author: ziggie1984

docs/release-notes/release-notes-0.19.2.md

@@ -37,6 +37,8 @@
   could lead to a memory issues due to a goroutine leak in the peer/gossiper
   code.
 
+- [Fixed](https://github.com/lightningnetwork/lnd/pull/10035) a deadlock (writer starvation) in the switch.
+
 # New Features
 
 ## Functional Enhancements