Add tag for "Combining Distributed DataParallel with Distributed RPC Framework" tutorial

Author: Jessica Lin

index.rst

@@ -365,6 +365,7 @@ Welcome to PyTorch Tutorials
    :card_description: Walk through a through a simple example of how to combine distributed data parallelism with distributed model parallelism.
    :image: _static/img/thumbnails/cropped/Combining-Distributed-DataParallel-with-Distributed-RPC-Framework.png
    :link: advanced/rpc_ddp_tutorial.html
+   :tags: Parallel-and-Distributed-Training
 
 .. End of tutorial card section