setup-ocaml 3.6.0; fix static linking #9817

Job	Run time
test-devcontainer	17m 44s
build-compiler (ubuntu-24.04, ocaml-variants.5.3.0+options,ocaml-option-static, true, true, linux...	5m 37s
build-compiler (macos-15-intel, 5.3.0, true, darwin-x64, x86_64-apple-darwin)	17m 41s
build-compiler (windows-2025, 5.3.0, true, win32-x64, x86_64-pc-windows-gnu, .exe)	11m 28s
build-compiler (macos-15, 5.3.0, true, darwin-arm64, aarch64-apple-darwin)	6m 12s
build-compiler (ubuntu-24.04-arm, ocaml-variants.5.3.0+options,ocaml-option-static, true, true, t...	6m 15s
build-compiler (ubuntu-24.04, ocaml-variants.5.0.0+options,ocaml-option-static, linux-x64, x86_64...	5m 2s
api-docs	1m 35s
pkg-pr-new	19s
test-integration-rewatch	0s
test-installation-npm	0s
test-installation-pnpm	0s
publish	0s
	1h 11m 53s

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