Auto merge of #22704 - learning:learning-patch-windows-troubleshooting, r=paulrouget
Auto merge of #22704 - learning:learning-patch-windows-troubleshooting, r=paulrouget

Add Windows troubleshooting

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Add Windows troubleshooting, about mach cannot run on a case-sensitive file system on Windows 10 v1803+

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- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes do not require tests because it just some text for `README.md`

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