Fixed syntax error

Author: madskristensen

appveyor.yml

@@ -2,7 +2,7 @@ image: Visual Studio 2017
 
 install:
   - ps: (new-object Net.WebClient).DownloadString("https://raw.github.com/madskristensen/ExtensionScripts/master/AppVeyor/vsix.ps1") | iex
-    - npm --version
+  - npm --version
 
 before_build:
   - ps: Vsix-IncrementVsixVersion | Vsix-UpdateBuildVersion