fix invokeAI torch/cuda check so we don't reinstall torch every update

StabilityMatrix.Core/Models/Packages/InvokeAI.cs

@@ -217,10 +217,17 @@ public class InvokeAI : BaseGitPackage
 
                     var args = new List<Argument>();
                     if (exists)
+                    {
+                        var pipPackages = await venvRunner.PipList().ConfigureAwait(false);
+                        var hasCuda121 = pipPackages.Any(
+                            p => p.Name == "torch" && p.Version.Contains("cu121")
+                        );
+                        if (!hasCuda121)
                         {
                             args.Add("--upgrade");
                             args.Add("--force-reinstall");
                         }
+                    }
 
                     await venvRunner
                         .PipInstall(