test(deps): update examples/nextjs (e2) to v15 (#1345) #2744

Job	Run time
ping-cli	6s
wait	30s
wait2	50s
wait2-delay-120	2m 19s
wait2-delay-50	1m 19s
wait3	1m 18s
wait3-for-200-seconds	4m 26s
wait4	27s
wait-multiple	1m 52s
wait-on-nextjs	49s
wait-on-vite	31s
wait-server-starts-after-100-seconds	1m 59s
wait-using-custom-command	45s
	17m 11s

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