Fix lldb-vscode README.md

Summary: The readme was missing "-" characters to enable links

Patch by Nathan Lanza <nathan@lanza.io>

Differential Revision: https://reviews.llvm.org/D52069

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@342266 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed