Upgrade generated CI to Ubuntu 24.04 (regen from ZProject). #73

Job	Run time
build (ubuntu-24.04, default, disabled, clang-format-11, automake autoconf clang-format-11 git li...	15s
build (ubuntu-24.04, cmake, 1, clang-format-11, cmake clang-format-11 git libzmq3-dev libczmq-dev)	17s
build (ubuntu-24.04, cmake, enabled, cmake git libzmq3-dev libczmq-dev)	54s
build (ubuntu-24.04, valgrind, enabled, automake autoconf valgrind git libzmq3-dev libczmq-dev)	47s
build (ubuntu-24.04, default, enabled, clang-format-11, automake autoconf clang-format-11 git lib...	16s
build (macos-latest, default, automake autoconf libtool zeromq, enabled)	1m 59s
build (macos-latest, default, disabled, automake autoconf libtool zeromq)	1m 26s
	5m 54s

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