docs(@angular/ssr): update examples for withRoutes configuration #2097

Job	Run time
list	17s
workflow (devkit-core-tests)	1m 22s
workflow (devkit-core-tests-rerun)	1m 32s
workflow (build-unit-tests)	2m 22s
workflow (build-cli)	1m 49s
workflow (modules-builder-tests)	1m 44s
	9m 6s

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