Made preview first column

README.md

@@ -18,7 +18,7 @@ dataset_size: 10132336442
 configs:
 - config_name: default
   data_files: physical_ai_simready_warehouse_01.csv
-  image_field: preview
+  image_field: asset_preview
 ---
 
 # NVIDIA Physical AI SimReady Warehouse OpenUSD Dataset
@@ -33,6 +33,7 @@ configs:
 This dataset includes the following:
 * This README file
 * A CSV catalog that enumerates all of the OpenUSD assets that are part of this dataset including a sub-folder of images that showcase each 3D asset ([physical_ai_simready_warehouse_01.csv](./physical_ai_simready_warehouse_01.csv)). The CSV file is organized in the following manner:
+    * asset_preview : A visual preview (thumbnail) of the asset
     * asset_name : Name of the asset
     * relative_path: location within archive of the asset Usd file
     * classification: Asset Classification (Prop, Scenario, Assembly, etc.)