macos

CI: Update FreeBSD image version for Cirrus runner. #3324

Job	Run time
macos-11 [ backend botan, shared libs on ]	40m 52s
macos-11 [ backend botan, shared libs on ]	40m 52s
macos-12 [ backend botan, shared libs on ]	7m 42s
macos-12 [ backend botan, shared libs on ]	7m 42s
macos-11 [ backend openssl@1.1, shared libs on ]	38m 40s
macos-11 [ backend openssl@1.1, shared libs on ]	38m 40s
macos-12 [ backend openssl@3, shared libs on ]	7m 0s
macos-12 [ backend openssl@3, shared libs on ]	7m 0s
macos-12 [ backend botan, shared libs off ]	8m 5s
macos-12 [ backend botan, shared libs off ]	8m 5s
macos-12 [ backend botan3, shared libs on ]	12m 19s
macos-12 [ backend botan3, shared libs on ]	7m 18s
	3h 44m 15s

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