Bump TerminalGuiVersion to 2.4.12-develop.18 #233

Job	Run time
resolve-version	15s
build-and-test (windows-latest, win-x64)	3m 14s
build-and-test (windows-latest, win-arm64)	3m 26s
build-and-test (macos-latest, osx-arm64)	1m 16s
build-and-test (ubuntu-latest, linux-x64)	1m 39s
pack-and-publish	30s
release-assets	0s
notify-downstream	4m 14s
notify-failure	0s
	14m 34s

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