docs: add release notes

Author: guggero

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

@@ -15,7 +15,13 @@
   especially useful in stateless-init mode where users will not have access to 
   a LiT macaroon to perform this call with. 
 
-- [Convert litrpc package into a module](https://github.com/lightninglabs/lightning-terminal/pull/823).
+* [Convert litrpc package into a module](https://github.com/lightninglabs/lightning-terminal/pull/823).
+
+* Add [custom channel
+  functionality](https://github.com/lightninglabs/lightning-terminal/pull/848)
+  to `litd`. Custom channels with Taproot Assets can now be created when `litd`
+  runs in integrated `lnd` mode (`lnd-mode=integrated`) with the Taproot Assets
+  daemon also running in integrated mode (`taproot-assets-mode=integrated`).
 
 ### LND
 
@@ -33,4 +39,6 @@
 
 * Andras Banki-Horvath
 * Elle Mouton
+* Jamal James
 * Kevin Cai
+* Oliver Gugger