Update distributed.rst to show that CUDA send/recv on GPU is supported (

#65601)

Summary:
Pull Request resolved: #65601

I believe this feature was supported one year ago:
#44921

#Closes: #65525
ghstack-source-id: 138918961

Test Plan: N/A

Reviewed By: pritamdamania87, mingzhe09088

Differential Revision: D31163535

fbshipit-source-id: 9321a0a5137a3e265e2b54bd78730ac28c7acd55

docs/source/distributed.rst

@@ -25,9 +25,9 @@ MPI supports CUDA only if the implementation used to build PyTorch supports it.
 +----------------+-----+-----+-----+-----+-----+-----+
 | Device         | CPU | GPU | CPU | GPU | CPU | GPU |
 +================+=====+=====+=====+=====+=====+=====+
-| send           | ✓   | ✘   | ✓   | ?   | ✘   | ✘   |
+| send           | ✓   | ✘   | ✓   | ?   | ✘   | ✓   |
 +----------------+-----+-----+-----+-----+-----+-----+
-| recv           | ✓   | ✘   | ✓   | ?   | ✘   | ✘   |
+| recv           | ✓   | ✘   | ✓   | ?   | ✘   | ✓   |
 +----------------+-----+-----+-----+-----+-----+-----+
 | broadcast      | ✓   | ✓   | ✓   | ?   | ✘   | ✓   |
 +----------------+-----+-----+-----+-----+-----+-----+