Repository: create-react-app
Issue: Not split the vendor code and app code after updating v5.0.0
Labels: needs triage,issue: bug report

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### Describe the bug

According to this, and my previous `create-react-app@4.0.3`:
https://create-react-app.dev/docs/production-build#static-file-caching

After build, it will generate three js files.
But now , only `main.[hash].js` is generated.

### Did you try recovering your dependencies?



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No. I just run `npm i -s react-scripts@5.0.0`

### Which terms did you search for in User Guide?

vendor code

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### Environment

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Environment Info:

  current version of create-react-app: 5.0.0
  running from C:\Users\heroboy\AppData\Roaming\npm\node_modules\create-react-app

  System:
    OS: Windows 10 10.0.19042
    CPU: (8) x64 Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz
  Binaries:
    Node: 17.2.0 - C:\Program Files\nodejs\node.EXE
    Yarn: Not Found
    npm: 6.14.8 - C:\Program Files\nodejs\npm.CMD
  Browsers:
    Chrome: 97.0.4692.71
    Edge: Spartan (44.19041.1266.0), Chromium (97.0.1072.55)
    Internet Explorer: 11.0.19041.1202
  npmPackages:
    react: ^17.0.1 => 17.0.1
    react-dom: ^17.0.1 => 17.0.1
    react-scripts: 5.0.0 => 5.0.0
  npmGlobalPackages:
    create-react-app: Not Found

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### Steps to reproduce

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### Expected behavior

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