build: update schematics dependencies to ~5.12.0 #8822

Job	Run time
build-e2e-windows	48s
build	45s
lint	47s
e2e-windows	1s
test	1s
Browser Compatibility Tests	1s
publish-snapshots	1s
e2e-package-managers	1s
e2e-snapshots	1s
e2e	1s
	2m 27s

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