Bump pnpm/action-setup from 5 to 6

[cknitt]

Bump node version for pnpm test to fix the CI error in #8336

[pkg-pr-new]

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rescript

npm i https://pkg.pr.new/rescript@8344

@rescript/darwin-arm64

npm i https://pkg.pr.new/@rescript/darwin-arm64@8344

@rescript/darwin-x64

npm i https://pkg.pr.new/@rescript/darwin-x64@8344

@rescript/linux-arm64

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@rescript/linux-x64

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@rescript/runtime

npm i https://pkg.pr.new/@rescript/runtime@8344

@rescript/win32-x64

npm i https://pkg.pr.new/@rescript/win32-x64@8344

commit: ceda91c