doc: Added mail/libdkim version 1.0.21

Author: schmonz

doc/CHANGES-2024

@@ -1,4 +1,4 @@
-$NetBSD: CHANGES-2024,v 1.789 2024/01/31 18:18:04 adam Exp $
+$NetBSD: CHANGES-2024,v 1.790 2024/01/31 19:20:05 schmonz Exp $
 
 Changes to the packages collection and infrastructure in 2024:
 
@@ -1050,3 +1050,4 @@ Changes to the packages collection and infrastructure in 2024:
 	Updated net/haproxy to 2.9.4 [adam 2024-01-31]
 	Updated databases/openldap to 2.6.7 [adam 2024-01-31]
 	Updated databases/lmdb to 0.9.32 [adam 2024-01-31]
+	Added mail/libdkim version 1.0.21 [schmonz 2024-01-31]