Bump ocaml/setup-ocaml from 3.6.0 to 3.6.1 #9914

Job	Run time
test-devcontainer	16m 37s
build-compiler (ubuntu-24.04, ocaml-variants.5.0.0+options,ocaml-option-static, linux-x64, x86_64...	4m 55s
build-compiler (ubuntu-24.04-arm, ocaml-variants.5.3.0+options,ocaml-option-static, true, true, t...	5m 40s
build-compiler (macos-15, 5.3.0, true, darwin-arm64, aarch64-apple-darwin, release)	5m 26s
build-compiler (windows-2025, 5.3.0, true, win32-x64, x86_64-pc-windows-gnu, .exe, release)	10m 49s
build-compiler (ubuntu-24.04, ocaml-variants.5.3.0+options,ocaml-option-static, true, true, linux...	5m 46s
build-compiler (macos-15-intel, 5.3.0, true, darwin-x64, x86_64-apple-darwin, release)	12m 38s
pkg-pr-new	55s
api-docs	2m 41s
test-installation-pnpm (ubuntu-24.04-arm)	23s
test-installation-pnpm (macos-15-intel)	28s
test-installation-pnpm (windows-2025)	51s
test-installation-npm (macos-15-intel)	31s
test-installation-npm (macos-15)	16s
test-installation-pnpm (ubuntu-24.04)	23s
test-installation-npm (ubuntu-24.04)	14s
test-installation-pnpm (macos-15)	17s
test-integration-rewatch (macos-15-intel)	10m 47s
test-integration-rewatch (ubuntu-24.04-arm)	2m 57s
test-installation-npm (ubuntu-24.04-arm)	17s
test-installation-npm (windows-2025)	1m 27s
test-integration-rewatch (macos-15)	4m 30s
test-integration-rewatch (windows-2025)	8m 14s
test-integration-rewatch (ubuntu-24.04)	3m 47s
publish	0s
	1h 40m 49s

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