There should be a newline between BUILD WITH CUDA and NVTX (pytorch#4…

…8048)

Summary:
When you do want to insert a `<br />` break tag using Markdown, you end a line with two or more spaces, then type return.

From
https://stackoverflow.com/questions/33191744/how-to-add-new-line-in-markdown-presentation/33191810

Pull Request resolved: pytorch#48048

Reviewed By: gchanan

Differential Revision: D25003623

Pulled By: walterddr

fbshipit-source-id: ab5f7267ae936f6f006b4afa43254afa690ef7f4

README.md

@@ -239,6 +239,7 @@ Build with CPU
 It's fairly easy to build with CPU. Visual Studio 2019 version 16.7.6 (MSVC toolchain version 14.27) or higher is recommended.
 
 Build with CUDA
+
 [NVTX](https://docs.nvidia.com/gameworks/content/gameworkslibrary/nvtx/nvidia_tools_extension_library_nvtx.htm) is needed to build Pytorch with CUDA.
 NVTX is a part of CUDA distributive, where it is called "Nsight Compute". To install it onto already installed CUDA run CUDA installation once again and check the corresponding checkbox.
 Make sure that CUDA with Nsight Compute is installed after Visual Studio.