Fixing nccl link in tarball install instructions (#1887)

Authors:
  - Corey J. Nolet (https://github.com/cjnolet)

Approvers:
  - Divye Gala (https://github.com/divyegala)

URL: #1887

Author: cjnolet

docs/source/build.rst

@@ -85,7 +85,7 @@ Tarball
 Install Dependencies
 ~~~~~~~~~~~~~~~~~~~~
 
-1. `NCCL <https://docs.nvidia.com/deeplearning/nccl/install-guide/index.html>` _
+1. `NCCL <https://docs.nvidia.com/deeplearning/nccl/install-guide/index.html>`_
 2. `libopenmp`
 3. CUDA Toolkit Runtime 12.2+
 4. Ampere architecture or better (compute capability >= 8.0)