chore: use discovered DOTNET_ROOT instead of "dotnet" found in PATH i…

…n uno templates checkup

UnoCheck/Checkups/DotNetNewUnoTemplatesCheckup.cs

@@ -4,6 +4,7 @@
 using DotNetCheck.Models;
 using System.Diagnostics;
 using System;
+using System.IO;
 using System.Threading.Tasks;
 using System.Text.RegularExpressions;
 using NuGet.Versioning;
@@ -31,7 +32,7 @@ internal class DotNetNewUnoTemplatesCheckup : Checkup
 
     public override async Task<DiagnosticResult> Examine(SharedState history)
     {
-        var dotnetOutput = GetDotNetNewInstalledList();
+        var dotnetOutput = GetDotNetNewInstalledList(history);
 
         var legacyVersion = GetInstalledVersion(dotnetOutput, _unoLegacyTemplatesOutputRegex);
         var version = GetInstalledVersion(dotnetOutput, _unoTemplatesOutputRegex);
@@ -63,11 +64,17 @@ public override async Task<DiagnosticResult> Examine(SharedState history)
         return DiagnosticResult.Ok(this);
     }
 
-    private string GetDotNetNewInstalledList()
+    private string GetDotNetNewInstalledList(SharedState? history)
     {
+        var binaryLocation = new DotNetSdk(history).DotNetExeLocation;
+        var dotnetCommand =
+            binaryLocation.Exists
+                ? binaryLocation.FullName
+                : "dotnet"; // fallback to the dotnet binary found in PATH
+
         // Running 'dotnet new uninstall' without any package ID will list all installed
         // dotnet new templates along with their versions.
-        var processInfo = new ProcessStartInfo("dotnet", "new uninstall");
+        var processInfo = new ProcessStartInfo(dotnetCommand, "new uninstall");
         processInfo.RedirectStandardOutput = true;
         processInfo.UseShellExecute = false;