Update flakey app dev tests (#47504)
x-ref:
https://github.com/vercel/next.js/actions/runs/4513582756/jobs/7948722605
x-ref:
https://github.com/vercel/next.js/actions/runs/4513582756/jobs/7948722818
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https://github.com/vercel/next.js/actions/runs/4513366262/jobs/7949059763
