change manylinux version

[mattip]

• I updated the package version in pyproject.toml and made sure the first 3 numbers match ./openblas_commit.txt. If I did not update ./openblas_commit.txt, I incremented the wheel build number (i.e. 0.3.29.0.0 to 0.3.29.0.1)

Note: update ./openblas_commit.txt with cd OpenBLAS; git describe --tags --abbrev=8 > ../openblas_commit.txt

Redo #267 in slower steps

[mattip]

closed by mistake

[mayeut]

I think those need to be exported (that was the case when using cibuildwheel configuration)

Suggested change

	CC="/opt/clang/bin/clang"
	CXX="/opt/clang/bin/clang++"
	LDFLAGS="-fuse-ld=lld"
	export CC="/opt/clang/bin/clang"
	export CXX="/opt/clang/bin/clang++"
	export LDFLAGS="-fuse-ld=lld"