Fix comment to reference TaggedBlobItem instead of FilteredBlobItem (Azure#29618)

Author: bvoytko

sdk/storage/Azure.Storage.Blobs/src/Models/TaggedBlobItem.cs

@@ -26,8 +26,8 @@ public class TaggedBlobItem
         public Tags Tags { get; internal set; }
 
         /// <summary>
-        /// Prevent direct instantiation of FilterBlobItem instances.
-        /// You can use BlobsModelFactory.FilterBlobItem instead.
+        /// Prevent direct instantiation of TaggedBlobItem instances.
+        /// You can use BlobsModelFactory.TaggedBlobItem instead.
         /// </summary>
         internal TaggedBlobItem() { }
     }