chore(ci): bump mac job timeout 40 → 90 min for notarization #28

Job	Run time
build (windows-2022, win, win-x64, dist, src/frontend/release/.exe src/frontend/release/.blockm...	5m 2s
build (ubuntu-24.04, linux, linux-x64, dist:linux, src/frontend/release/*.AppImage src/frontend/r...	3m 5s
build (macos-14, mac, osx-arm64, dist:mac, src/frontend/release/.dmg src/frontend/release/.zip ...	1h 30m 17s
	1h 38m 24s

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