docs: update release notes

Author: bhandras

docs/release-notes/release-notes-0.13.5.md

@@ -7,6 +7,8 @@
 - [Fixed a bug due to google-protobuf where a channel with SCID aliases on would cause terminal frontend
   to be unable to call the `ListChannels` RPC](https://github.com/lightninglabs/lightning-terminal/pull/850).
 
+- [Convert litrpc package into a module](https://github.com/lightninglabs/lightning-terminal/pull/823).
+
 ### LND
 
 ### Loop
@@ -21,4 +23,6 @@
 
 # Contributors (Alphabetical Order)
 
+* Andras Banki-Horvath
+
 * Kevin Cai