docs: add noop HTLCs release note

Author: GeorgeTsagk

docs/release-notes/release-notes-0.7.0.md

@@ -73,6 +73,12 @@
   [related PR](https://github.com/lightninglabs/taproot-assets/pull/1613) for
   more info.
 
+- Asset HTLCs that are received or sent do not shift the satoshi balance of the
+  channel. This is because now the default behavior is to use
+  [Noop HTLCs](https://github.com/lightningnetwork/lnd/pull/9871) which locks
+  some above-dust sats amount with the HTLC as long as it's in-flight, but
+  nullifies it upon settlement.
+
 ## RPC Additions
 
 - The [price oracle RPC calls now have an intent, optional peer ID and metadata