fix(@schematics/angular): correct style guide paths for standalone co… #2201

Job	Run time
list	26s
workflow (modules-builder-tests)	1m 46s
workflow (build-unit-tests)	2m 22s
workflow (build-cli)	1m 45s
workflow (devkit-core-tests)	1m 16s
workflow (devkit-core-tests-rerun)	1m 28s
	9m 3s

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