trim BaseRegistry before checking null or empty

Author: Surayya Huseyn Zada

src/Containers/Microsoft.NET.Build.Containers/Tasks/CreateImageIndex.cs

@@ -23,7 +23,7 @@ public void Dispose()
         _cancellationTokenSource.Dispose();
     }
 
-    private bool IsLocalPull => string.IsNullOrEmpty(BaseRegistry);
+    private bool IsLocalPull => string.IsNullOrEmpty(BaseRegistry.Trim());
 
     public override bool Execute()
     {

src/Containers/Microsoft.NET.Build.Containers/Tasks/CreateNewImage.cs

@@ -23,7 +23,7 @@ public sealed partial class CreateNewImage : Microsoft.Build.Utilities.Task, ICa
     /// </summary>
     public string ToolPath { get; set; }
 
-    private bool IsLocalPull => string.IsNullOrEmpty(BaseRegistry);
+    private bool IsLocalPull => string.IsNullOrEmpty(BaseRegistry.Trim());
 
     public void Cancel() => _cancellationTokenSource.Cancel();