!6 [sync] PR-5: update libcxx release version

From: @openeuler-sync-bot 
Reviewed-by: @cf-zhao 
Signed-off-by: @cf-zhao

libcxx.spec

@@ -2,7 +2,7 @@
 
 Name:           libcxx
 Version:        12.0.1
-Release:        1%{?dist}
+Release:        2
 Summary:        LLVM "libcxx" runtime libraries
 License:        BSD
 URL:            http://llvm.org
@@ -67,5 +67,8 @@ install include/c++/v1/refstring.h %{buildroot}/%{_libdir}/../include/c++/v1
 %{_libdir}/libc++.so
 
 %changelog
+* Tue Mar 12 2024 Wang Zehong <wangzehong2@huawei.com> - 12.0.1-2
+- update to 12.0.1-2
+
 * Tue Feb 7 2023 Wang Zehong <wangzehong2@huawei.com> - 12.0.1-1
 - update to 12.0.1-1