PR build (run the installer): do validate the correct installation

When we just installed the 32-bit variant of Git for Windows, we would
really actually like to validate that one, not the 64-bit installation
that comes as part of the hosted GitHub Actions runners.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

.github/workflows/main.yml

@@ -192,8 +192,13 @@ jobs:
             Write-Host "::error::Installer failed with exit code $exitCode!"
             exit 1
           }
-          "$env:ProgramFiles\Git\usr\bin" | Out-File -Encoding ascii -Append $env:GITHUB_PATH
-          "$env:ProgramFiles\Git\mingw${{env.ARCH_BITNESS}}\bin" | Out-File -Encoding ascii -Append $env:GITHUB_PATH
+          if ("${{ matrix.bitness }}" -eq 32) {
+            "${env:ProgramFiles(x86)}\Git\usr\bin" | Out-File -Encoding ascii -Append $env:GITHUB_PATH
+            "${env:ProgramFiles(x86)}\Git\mingw32\bin" | Out-File -Encoding ascii -Append $env:GITHUB_PATH
+          } else {
+            "$env:ProgramFiles\Git\usr\bin" | Out-File -Encoding ascii -Append $env:GITHUB_PATH
+            "$env:ProgramFiles\Git\mingw${{env.ARCH_BITNESS}}\bin" | Out-File -Encoding ascii -Append $env:GITHUB_PATH
+          }
       - name: validate
         if: matrix.artifact == 'build-installers'
         shell: bash