docs: fixup legacy HTML link

llvm-svn: 169308
diff --git a/llvm/docs/userguides.rst b/llvm/docs/userguides.rst
index 8f18420..dd87055 100644
--- a/llvm/docs/userguides.rst
+++ b/llvm/docs/userguides.rst
@@ -37,8 +37,7 @@
 
    Notes on building and testing LLVM/Clang on ARM.
 
-* `Getting Started with the LLVM System using Microsoft Visual Studio
-  <GettingStartedVS.html>`_
+* :doc:`GettingStartedVS`
 
    An addendum to the main Getting Started guide for those using Visual Studio
    on Windows.