CI: macos: work around regular issues when homebrew python gets updated #213

Job	Run time
Upload the source	1m 49s
macos (macos-12)	3m 27s
linux (opensuse/leap:latest, clang gcc11-c++, CC=clang CXX=clang++)	3m 40s
macos (macos-13)	7m 38s
linux (opensuse/tumbleweed, gcc gcc-c++)	2m 57s
linux (opensuse/tumbleweed, clang, CC=clang CXX=clang++)	2m 57s
macos (macos-14)	1m 36s
linux (archlinux:base, gcc)	3m 7s
linux (archlinux:base, clang, CC=clang CXX=clang++)	2m 57s
linux (ubuntu:20.04, gcc-10 g++-10, CC=gcc-10 CXX=g++-10)	2m 34s
linux (ubuntu:20.04, clang-11 libstdc++-10-dev, CC=clang-11 CXX=clang++-11)	3m 0s
linux (alpine, gcc, CC=gcc CXX=g++)	3m 1s
linux (fedora:latest, gcc gcc-g++)	3m 0s
linux (fedora:rawhide, gcc gcc-g++)	2m 52s
	44m 35s

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