This patch updates fdupes from 2.3.0 to 2.3.1.

Tested on amd64.

Index: Makefile
===================================================================
RCS file: /cvs/ports/sysutils/fdupes/Makefile,v
retrieving revision 1.18
diff -u -p -u -p -r1.18 Makefile
--- Makefile	30 Jan 2024 19:39:37 -0000	1.18
+++ Makefile	19 Jun 2024 07:38:38 -0000
@@ -1,6 +1,6 @@
 COMMENT=	identify or delete duplicate files
 
-V=		2.3.0
+V=		2.3.1
 DISTNAME=	fdupes-$V
 CATEGORIES=	sysutils
 
Index: distinfo
===================================================================
RCS file: /cvs/ports/sysutils/fdupes/distinfo,v
retrieving revision 1.8
diff -u -p -u -p -r1.8 distinfo
--- distinfo	30 Jan 2024 19:39:37 -0000	1.8
+++ distinfo	19 Jun 2024 07:38:38 -0000
@@ -1,2 +1,2 @@
-SHA256 (fdupes-2.3.0.tar.gz) = YXDWSn5WXuMUzKTdJaEj5gqh4/67EeVweL67nB2n4Bk=
-SIZE (fdupes-2.3.0.tar.gz) = 154700
+SHA256 (fdupes-2.3.1.tar.gz) = JIK0uMkxvRfOoh9MJ/pHR7h3UjAp1X95SitI5sN42xc=
+SIZE (fdupes-2.3.1.tar.gz) = 155094