Add some release notes for 0.23.2

Fabcien · Fabcien · commit 4980f3162168 · 2021-04-16T22:08:54.000+02:00
Summary: As per title. Test Plan: Read it. Reviewers: #bitcoin_abc, majcosta Reviewed By: #bitcoin_abc, majcosta Differential Revision: https://reviews.bitcoinabc.org/D9427
diff --git a/doc/release-notes.md b/doc/release-notes.md
@@ -5,3 +5,4 @@ Bitcoin ABC version 0.23.2 is now available from:
   <https://download.bitcoinabc.org/0.23.2/>
 
 This release includes the following features and fixes:
+ - Improve performance of the cryptography library libsecp256k1

Original file line number	Diff line number	Diff line change
`@@ -5,3 +5,4 @@ Bitcoin ABC version 0.23.2 is now available from:`
`5`	`5`	`<https://download.bitcoinabc.org/0.23.2/>`
`6`	`6`
`7`	`7`	`This release includes the following features and fixes:`
	`8`	`+ - Improve performance of the cryptography library libsecp256k1`