fix: generate correct error message if Wix is not installed

Fixes #27955

Signed-off-by: Jeff MAURY <jmaury@redhat.com>

contrib/win-installer/build.ps1

@@ -112,9 +112,9 @@ if (! (Get-Command 'dotnet' -errorAction SilentlyContinue)) {
 Invoke-Expression 'dotnet tool list --global wix' `
     -ErrorAction SilentlyContinue | Out-Null
 if ($LASTEXITCODE -ne 0) {
-    Write-Error "Required dep `"Wix Toolset`" is not installed. " `
+    Write-Error ("Required dep `"Wix Toolset`" is not installed. " `
         + 'Please install it with the command ' `
-        + "`"dotnet tool install --global wix`""
+        + "`"dotnet tool install --global wix`"")
     Exit 1
 }