docs: rework subfolders example (#1036) #283

Job	Run time
ping-cli	9s
wait	1m 0s
wait2	53s
wait2-delay-120	2m 21s
wait2-delay-50	1m 20s
wait3	1m 19s
wait3-for-200-seconds	4m 29s
wait4	44s
wait-multiple	2m 13s
wait-on-nextjs	34s
wait-on-vite	18s
wait-server-starts-after-100-seconds	2m 8s
wait-using-custom-command	51s
	18m 19s

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