Update macOS build recommendations to use OpenSSL 3.0

[erlend-aasland]

Quoting @ned-deily in python/cpython#99079 (comment):

If we assume that that we should focus on 3.0.x support on macOS for the time being at least, I think the first step would be to update our GitHub Workflow macOS CI jobs for 3.11+ to use 3.0.x from Homebrew: currently they are using 1.1.x. We should also update the devguide recommendations for macOS to use 3.0.x; there is a WIP issue for the devguide that should be changed to use 3.0.x. Also, any macOS buildbots should be updated, as feasible. With that additional experience we can then move the macOS installers to using 3.0.x sometime in the not-too-distant future.