docs: add release-notes

Author: ziggie1984

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

@@ -32,6 +32,10 @@
 - [Fixed](https://github.com/lightningnetwork/lnd/pull/9978) a deadlock which
   can happen when the peer start-up has not yet completed but a another p2p
   connection attempt tries to disconnect the peer.
+  
+- [Fixed](https://github.com/lightningnetwork/lnd/pull/10012) a case which
+  could lead to a memory issues due to a goroutine leak in the peer/gossiper
+  code.
 
 # New Features