math/openblas: Update to 0.3.20

It fixes CPU detection error with Intel Alder Lake.

ChangeLog:	https://github.com/xianyi/OpenBLAS/blob/v0.3.20/Changelog.txt
PR:		262838
Approved by:	maintainer

math/openblas/Makefile

@@ -2,7 +2,7 @@
 
 PORTNAME=	openblas
 DISTVERSIONPREFIX=	v
-DISTVERSION=	0.3.18
+DISTVERSION=	0.3.20
 PORTEPOCH=	1
 CATEGORIES=	math
 MASTER_SITES=	NL/lapack/timing/:lapack_tmg

math/openblas/distinfo

-TIMESTAMP = 1633808705
+TIMESTAMP = 1648345083
 SHA256 (openblas/large.tgz) = f328d88b7fa97722f271d7d0cfea1c220e0f8e5ed5ff01d8ef1eb51d6f4243a1
 SIZE (openblas/large.tgz) = 2595
 SHA256 (openblas/timing.tgz) = 999c65f8ea8bd4eac7f1c7f3463d4946917afd20a997807300fe35d70122f3af
 SIZE (openblas/timing.tgz) = 1059485
-SHA256 (openblas/xianyi-OpenBLAS-v0.3.18_GH0.tar.gz) = 1632c1e8cca62d8bed064b37747e331a1796fc46f688626337362bf0d16aeadb
-SIZE (openblas/xianyi-OpenBLAS-v0.3.18_GH0.tar.gz) = 12619822
+SHA256 (openblas/xianyi-OpenBLAS-v0.3.20_GH0.tar.gz) = 8495c9affc536253648e942908e88e097f2ec7753ede55aca52e5dead3029e3c
+SIZE (openblas/xianyi-OpenBLAS-v0.3.20_GH0.tar.gz) = 12742441