Update DLRM v2 assets download commands to support R2 downloader (#2372)

Author: anandhu-eng

recommendation/dlrm_v2/pytorch/README.md

@@ -78,7 +78,7 @@ CFLAGS="-std=c++14" python setup.py develop --user
 #### Download dataset through MLCFlow Automation
 
 ```
-mlcr get,preprocessed,dataset,criteo,_validation --outdirname=<path_to_download> -j
+mlcr get,preprocessed,dataset,criteo,_r2-downloader,_mlc --outdirname=<path_to_download> -j
 ```
 
 #### Download the preprocessed dataset using Rclone.
@@ -115,7 +115,7 @@ N/A | pytorch | <2GB | -
 #### Download model through MLCFlow Automation
 
 ```
-mlcr get,ml-model,get,ml-model,dlrm,_pytorch,_weight_sharded,_rclone --outdirname=<path_to_download> -j
+mlcr get,ml-model,get,ml-model,dlrm,_pytorch,_fp32,_weight_sharded,_r2-downloader --outdirname=<path_to_download> -j
 ```
 
 #### Manual method