Set version to 12.0.1 #8960

Job	Run time
build-compiler (ubuntu-24.04, ocaml-variants.5.3.0+options,ocaml-option-static, true, true, linux...	5m 8s
build-compiler (macos-15-intel, 5.3.0, true, darwin-x64, x86_64-apple-darwin)	10m 35s
build-compiler (windows-2025, 5.3.0, true, win32-x64, x86_64-pc-windows-gnu, .exe)	11m 38s
build-compiler (ubuntu-24.04-arm, ocaml-variants.5.3.0+options,ocaml-option-static, true, true, t...	6m 9s
build-compiler (ubuntu-24.04, ocaml-variants.4.14.2+options,ocaml-option-static, linux-x64, x86_6...	4m 59s
build-compiler (macos-15, 5.3.0, true, darwin-arm64, aarch64-apple-darwin)	8m 35s
api-docs	1m 38s
pkg-pr-new	54s
test-installation-pnpm (macos-15-intel)	26s
test-installation-pnpm (macos-15)	22s
test-installation-pnpm (ubuntu-24.04)	15s
test-installation-pnpm (windows-2025)	37s
test-installation-npm (macos-15)	19s
test-integration-rewatch (macos-15)	1m 49s
test-installation-npm (ubuntu-24.04-arm)	17s
test-installation-npm (macos-15-intel)	36s
test-installation-npm (ubuntu-24.04)	17s
test-integration-rewatch (ubuntu-24.04-arm)	1m 10s
test-installation-pnpm (ubuntu-24.04-arm)	17s
test-integration-rewatch (ubuntu-24.04)	1m 17s
test-integration-rewatch (windows-2025)	2m 56s
test-integration-rewatch (macos-15-intel)	3m 16s
test-installation-npm (windows-2025)	1m 24s
publish	0s
	1h 4m 54s

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