mimicking Scipy:5

Author: mzecc

.github/workflows/build-wheels.yaml

@@ -95,6 +95,7 @@ jobs:
           Invoke-WebRequest https://github.com/llvm/llvm-project/releases/download/llvmorg-20.1.8/LLVM-20.1.8-woa64.exe -OutFile LLVM-woa64.exe
           Start-Process -FilePath ".\LLVM-woa64.exe" -ArgumentList "/S" -Wait
           echo "C:\Program Files\LLVM\bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
+          $env:PATH = "C:\Program Files\LLVM\bin;" + $env:PATH
 
           #          $env:VCPKG_ROOT = "C:\vcpkg"
           #git clone https://github.com/microsoft/vcpkg $env:VCPKG_ROOT