fix(@angular/cli): improve signal forms lesson examples in AI tutor #9487

Job	Run time
build-e2e-windows	2m 35s
lint	1m 56s
build	2m 9s
publish-snapshots	39s
Browser Compatibility Tests	41s
test	47s
e2e-windows (22, esbuild, 0)	18s
e2e-windows (22, esbuild, 2)	12s
e2e-windows (22, esbuild, 5)	7s
e2e-windows (22, esbuild, 1)	9s
e2e-windows (22, esbuild, 3)	11s
e2e-windows (22, webpack, 5)	12s
e2e-windows (22, esbuild, 4)	12s
e2e-windows (22, webpack, 4)	10s
e2e-windows (22, webpack, 0)	12s
e2e-windows (22, webpack, 3)	10s
e2e-windows (22, webpack, 2)	8s
e2e-windows (22, webpack, 1)	12s
e2e	1s
e2e-package-managers	1s
e2e-snapshots	1s
	11m 3s

Provide feedback