fix: update dependency @pnpm/read-project-manifest to v6 #4466

Job	Run time
NodeJS installed from stock Ubuntu-LTS packages (not external sources)	2m 30s
build (windows-2025, 20)	2m 37s
build (ubuntu-22.04, 18)	1m 4s
build (windows-2025, 18)	3m 10s
build (ubuntu-22.04, 20)	1m 21s
build (windows-2022, 18)	3m 0s
build (ubuntu-24.04, 18)	1m 18s
build (ubuntu-24.04, 20)	58s
build (windows-2022, 20)	4m 3s
Code quality	48s
	20m 49s

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