Add mention of brew install eloston-chromium to MacOS row on website

[qpwo]

I was downloading from the site for a while until I learned the brew install is more up-to-date, so the site could just mention that fact

[weakish]

Add mention of brew install eloston-chromium
I was downloading from the site for a while until I learned the brew install is more up-to-date

The homebrew formula eloston-chromium downloads binaries from
https://github.com/ungoogled-software/ungoogled-chromium-macos/releases

It seems that the maintainers of repo ungoogled-chromium-macos forget to sync recent releases to repo ungoogled-chromium-binaries