docs(@angular/build): reference vitest-base config in unit-test schem… #10257

Job	Run time
build	51s
build-e2e-windows	4m 51s
lint	2m 12s
Browser Compatibility Tests	-1s
e2e	0s
test	-1s
e2e-snapshots	0s
publish-snapshots	-1s
e2e-package-managers	0s
e2e-windows (24, esbuild, 0)	14m 31s
e2e-windows (24, esbuild, 4)	11m 41s
e2e-windows (24, esbuild, 3)	11m 9s
e2e-windows (24, esbuild, 2)	10m 50s
e2e-windows (24, webpack, 1)	15m 8s
e2e-windows (24, webpack, 5)	12m 23s
e2e-windows (24, esbuild, 1)	12m 53s
e2e-windows (24, webpack, 0)	14m 32s
e2e-windows (24, esbuild, 5)	16m 10s
e2e-windows (24, webpack, 4)	18m 17s
e2e-windows (24, webpack, 3)	13m 33s
e2e-windows (24, webpack, 2)	16m 48s
	2h 55m 46s

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