docs(@angular/ssr): update examples for withRoutes configuration #2098

Job	Run time
list	27s
workflow (devkit-core-tests)	1m 26s
workflow (build-unit-tests)	2m 24s
workflow (build-cli)	1m 29s
workflow (modules-builder-tests)	1m 45s
workflow (devkit-core-tests-rerun)	1m 32s
	9m 3s

Provide feedback