Merge pull request #28004 from apple/compnerd-one-time-setup

Update WindowsBuild.md

Author: compnerd

docs/WindowsBuild.md

@@ -59,10 +59,10 @@ git clone https://github.com/compnerd/windows-swift windows-swift
   `${UniversalCRTSdkDir}/Include/${UCRTVersion}/ucrt` as `module.modulemap`, copying `visualc.modulemap` located at `swift/stdlib/public/Platform/visualc.modulemap` into `${VCToolsInstallDir}/include` as `module.modulemap`, and copying `winsdk.modulemap` located at `swift/stdlib/public/Platform/winsdk.modulemap` into `${UniversalCRTSdkDir}/Include/${UCRTVersion}/um` and setup the `visualc.apinotes` located at `swift/stdlib/public/Platform/visualc.apinotes` into `${VCToolsInstallDir}/include` as `visualc.apinotes`
 
 ```cmd
-mklink "%UniversalCRTSdkDir%\Include\%UCRTVersion%\ucrt\module.modulemap" S:\swift\stdlib\public\Platform\ucrt.modulemap
-mklink "%UniversalCRTSdkDir%\Include\%UCRTVersion%\um\module.modulemap" S:\swift\stdlib\public\Platform\winsdk.modulemap
-mklink "%VCToolsInstallDir%\include\module.modulemap" S:\swift\stdlib\public\Platform\visualc.modulemap
-mklink "%VCToolsInstallDir%\include\visualc.apinotes" S:\swift\stdlib\public\Platform\visualc.apinotes
+mklink "%UniversalCRTSdkDir%\Include\%UCRTVersion%\ucrt\module.modulemap" S:\toolchain\swift\stdlib\public\Platform\ucrt.modulemap
+mklink "%UniversalCRTSdkDir%\Include\%UCRTVersion%\um\module.modulemap" S:\toolchain\swift\stdlib\public\Platform\winsdk.modulemap
+mklink "%VCToolsInstallDir%\include\module.modulemap" S:\toolchain\swift\stdlib\public\Platform\visualc.modulemap
+mklink "%VCToolsInstallDir%\include\visualc.apinotes" S:\toolchain\swift\stdlib\public\Platform\visualc.apinotes
 ```
 
 Warning: Creating the above links usually requires administrator privileges. The quick and easy way to do this is to open a second developer prompt by right clicking whatever shortcut you used to open the first one, choosing Run As Administrator, and pasting the above commands into the resulting window. You can then close the privileged prompt; this is the only step which requires elevation.