sagemathgh-38705: update openblas to 0.3.28

    
probably needed for macOS 15.0
See https://groups.google.com/d/msgid/sage-
devel/21f2c768-c732-46d3-aef4-be86d2b42c1cn%40googlegroups.com

This picks a small part from sagemath#38227
### 📝 Checklist

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- [x] The title is concise and informative.
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preview.
    
URL: sagemath#38705
Reported by: Dima Pasechnik
Reviewer(s): Kwankyu Lee

build/pkgs/openblas/checksums.ini

@@ -1,4 +1,4 @@
 tarball=openblas-VERSION.tar.gz
-sha1=af6dce0e486e684be842053fcbd98eaf97e39749
-sha256=4e6e4f5cb14c209262e33e6816d70221a2fe49eb69eaf0a06f065598ac602c68
+sha1=f75172274a7ce69901605b8c759e2e0891c9b7f4
+sha256=f1003466ad074e9b0c8d421a204121100b0751c96fc6fcf3d1456bd12f8a00a1
 upstream_url=https://github.com/xianyi/OpenBLAS/archive/vVERSION.tar.gz

build/pkgs/openblas/package-version.txt

@@ -1 +1 @@
-0.3.26
+0.3.28