fix(@schematics/angular): add extra prettier config #1570

Job	Run time
list	29s
workflow (devkit-core-tests-rerun)	1m 19s
workflow (build-cli)	1m 39s
workflow (build-unit-tests)	2m 10s
workflow (devkit-core-tests)	1m 15s
workflow (modules-builder-tests)	1m 40s
	8m 32s

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