doc: release-notes-0.20.0

Author: MPins

docs/release-notes/release-notes-0.20.0.md

@@ -29,6 +29,10 @@
 - Fixed [shutdown deadlock](https://github.com/lightningnetwork/lnd/pull/10042)
   when we fail starting up LND before we startup the chanbackup sub-server.
 
+- Fixed BOLT-11 invoice parsing behavior: [now errors](
+  https://github.com/lightningnetwork/lnd/pull/9993) are returned when receiving
+  empty route hints or a non-UTF-8-encoded description.
+
 - [Fixed](https://github.com/lightningnetwork/lnd/pull/10027) an issue where
   known TLV fields were incorrectly encoded into the `ExtraData` field of
   messages in the dynamic commitment set.