fix wrong URL (msvscode -> vscode) (#1470)

Author: shsong

Documentation/Getting started.md

@@ -3,7 +3,7 @@
 These steps will allow you to debug the typescript code that is part of the Microsoft CppTools extension for Visual Studio Code.
 
 Prerequisite steps:
-  * Clone [this](https://github.com/Microsoft/msvscode-cpptools) repository.
+  * Clone [this](https://github.com/Microsoft/vscode-cpptools) repository.
   * Install [npm](https://nodejs.org).
   * From a command line, run the following commands from the Extension folder in the root of the repository:
       * `npm install -g vsce`