fix: incoming requests should use plural

[huozhi]

What

Fixes the mismatch between docs and the feature code, aligning with docs and other properties in logging option.

[ijjk]

Failing test suites

Commit: eda5790

__NEXT_EXPERIMENTAL_PPR=true pnpm test-dev test/e2e/persistent-caching/persistent-caching.test.ts (PPR)

• persistent-caching > should persistent cache loaders

Expand output

● persistent-caching › should persistent cache loaders

expect(received).toBe(expected) // Object.is equality

Expected: "Timestamp = 1738602280526"
Received: "Timestamp = 1738602300357"

  55 |       const browser = await next.browser('/pages')
  56 |       // TODO Persistent Caching for webpack dev server is broken
> 57 |       expect(await browser.elementByCss('main').text()).toBe(pagesTimestamp)
     |                                                         ^
  58 |       await browser.close()
  59 |     }
  60 |   })

  at Object.toBe (e2e/persistent-caching/persistent-caching.test.ts:57:57)

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