Remove ubuntu-20.04 from build-build matrix due to GH removal on 2025… #660

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openssl@1.1 1.1.1w is already installed and up-to-date. To reinstall 1.1.1w, run: brew reinstall openssl@1.1

libevent 2.1.12_1 is already installed and up-to-date. To reinstall 2.1.12_1, run: brew reinstall libevent

libtool 2.5.4 is already installed and up-to-date. To reinstall 2.5.4, run: brew reinstall libtool

autoconf 2.72 is already installed and up-to-date. To reinstall 2.72, run: brew reinstall autoconf