timeout を 30 -> 15 に減らす #858

Job	Run time
build_pyi	1m 18s
build_linux_macos (ubuntu-22.04_x86_64, ubuntu-22.04_x86_64, ubuntu-22.04, ubuntu, 3.10)	2m 26s
build_windows (3.10)	3m 13s
build_linux_macos (ubuntu-22.04_x86_64, ubuntu-22.04_x86_64, ubuntu-22.04, ubuntu, 3.11)	1m 51s
build_windows (3.11)	2m 40s
build_windows (3.12)	2m 40s
build_linux_macos (ubuntu-22.04_x86_64, ubuntu-22.04_x86_64, ubuntu-22.04, ubuntu, 3.12)	1m 41s
build_linux_macos (macos-13_arm64, macos_arm64, macos-13, macos, macosx-13.0-arm64, -arch arm64, ...	3m 5s
build_linux_macos (macos-13_arm64, macos_arm64, macos-13, macos, macosx-13.0-arm64, -arch arm64, ...	2m 26s
build_linux_macos (macos-13_arm64, macos_arm64, macos-13, macos, macosx-13.0-arm64, -arch arm64, ...	2m 31s
build_linux_macos (macos-14_arm64, macos_arm64, macos-14, macos, macosx-14.0-arm64, -arch arm64, ...	1m 24s
build_linux_macos (macos-14_arm64, macos_arm64, macos-14, macos, macosx-14.0-arm64, -arch arm64, ...	1m 2s
build_linux_macos (macos-14_arm64, macos_arm64, macos-14, macos, macosx-14.0-arm64, -arch arm64, ...	1m 5s
slack_notify_succeeded	8s
create-release	0s
publish_wheel	0s
slack_notify_failed	0s
	27m 30s

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