update documentation

Author: web-flow

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

@@ -250,6 +250,9 @@ when running LND with an aux component injected (custom channels).
   to allow for restriction of access based on an IP range. Prior to this only
   specific IPs could be allowed or denied.
 
+* A [command was created](https://github.com/lightningnetwork/lnd/pull/9781) to
+  load mission control data generated by `lncli querymc`.
+
 # Improvements
 ## Functional Updates