Update README to link to NCCL2 part 3

[ROCm/rccl commit: 4a33f66e27]
2017-08-04 09:44:09 -07:00
@@ -1,6 +1,7 @@
 **IMPORTANT NOTE**

-**NCCL1 is no longer maintained/updated and has been replaced by NCCL2, available at http://developer.nvidia.com/nccl.**
+**NCCL1 is no longer maintained/updated and has been replaced by NCCL2, available at**
+**http://developer.nvidia.com/nccl.**

 # NCCL