Update appveyor.yml (#15)

* Update appveyor.yml

* MOOSE generated documentation [skip ci]

.appveyor/appveyor.yml

@@ -27,7 +27,7 @@ init:
 #  - ps: iex ((new-object net.webclient).DownloadString('https://raw.githubusercontent.com/appveyor/ci/master/scripts/enable-rdp.ps1'))
 
 install:
-# Outcomment if lua environment invalidates and needs to be reinstalled, otherwise all will run from the cache.
+# Outcomment if lua environment invalidates and needs to be reinstalled, otherwise all will run from the cache...
   - call choco install -y 7zip.commandline
   - call choco install -y lua51
   - call choco install -y luarocks