Fix error swallowing in catch block

Write-Error is suppressed by SilentlyContinue at the top of the script,
so failures were silent. Switch to Write-Warning which is always visible.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1-estudio-Install-TacticalRMM-and-RustDesk.ps1

@@ -190,9 +190,7 @@ If (Get-Service $serviceName -ErrorAction SilentlyContinue) {
         exit 0
     }
     Catch {
-        $ErrorMessage = $_.Exception.Message
-        $FailedItem   = $_.Exception.ItemName
-        Write-Error -Message "$ErrorMessage $FailedItem"
+        Write-Warning "TacticalRMM install failed: $($_.Exception.Message)"
         exit 1
     }
     Finally {