build: update dependency rules_nodejs to v6.6.1 #9217

Job	Run time
build	13s
lint	14s
build-e2e-windows	14s
publish-snapshots	1s
e2e-windows	1s
test	1s
e2e-snapshots	1s
Browser Compatibility Tests	1s
e2e-package-managers	1s
e2e	1s
	48s

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