docs: add error-relaying release note

Author: jtobin

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

@@ -147,6 +147,10 @@
   [PR](https://github.com/lightninglabs/taproot-assets/pull/1640) addresses the
   issue.
 
+- Errors received from a price oracle [are now relayed to a requesting
+  peer](FIXME) in the reject message sent to them, instead of being
+  ignored.
+
 ## RPC Updates
 
 ## tapcli Updates