update games/openttd

tested on amd64 by playing a game

ok?

Index: Makefile
===================================================================
RCS file: /cvs/ports/games/openttd/Makefile,v
retrieving revision 1.85
diff -u -p -r1.85 Makefile
--- Makefile 26 Apr 2023 08:34:13 -0000 1.85
+++ Makefile 26 Jul 2023 12:49:04 -0000
@@ -1,6 +1,6 @@
COMMENT= open source clone of the game Transport Tycoon Deluxe

-V = 13.1
+V = 13.3
DISTNAME = openttd-$V-source
PKGNAME = openttd-$V

Index: distinfo
===================================================================
RCS file: /cvs/ports/games/openttd/distinfo,v
retrieving revision 1.44
diff -u -p -r1.44 distinfo
--- distinfo 26 Apr 2023 08:34:13 -0000 1.44
+++ distinfo 26 Jul 2023 12:49:04 -0000
@@ -1,2 +1,2 @@
-SHA256 (openttd/openttd-13.1-source.tar.xz) = Xt8i03A1I4KF72cql9WeZCgL66sj5YR4CDTM1r4KWLs=
-SIZE (openttd/openttd-13.1-source.tar.xz) = 7407360
+SHA256 (openttd/openttd-13.3-source.tar.xz) = qvoW0vtnFlE0xzqIj3n3pe19oXoEz26ez2csnLiecZI=
+SIZE (openttd/openttd-13.3-source.tar.xz) = 7417568