docs: update release notes

bhandras · bhandras · commit bfb191c2336e · 2021-07-30T13:22:13.000+02:00
diff --git a/release_notes.md b/release_notes.md
@@ -15,6 +15,9 @@ This file tracks release notes for the loop client.
 ## Next release
 
 #### New Features
+* Loop-in quote now asks the server to optionally probe the client to test
+  inbound liquidity. The server may use this information to give more accurate
+  quotes.
 
 #### Breaking Changes
 
