docs/release-notes: add item for easy AMP CLI re-use

docs/release-notes/release-notes-0.13.2.md

@@ -1,6 +1,12 @@
 # Release Notes
 
-# Bug Fixes
+## AMP
+
+A new command line option (`--amp-reuse`) has been added to make it easier for
+users to re-use AMP invoice on the command line using either the `payinvoice`
+or `sendpayment` command.
+
+## Bug Fixes
 
 [A bug has been fixed in the command line argument parsing for the
 `sendpayment` command that previously prevented users from being able to re-use