(au) provide more around how to setup gist id

appveyor.yml

@@ -29,7 +29,7 @@ environment:
   mail_port: 587
   mail_enablessl: true
 
-  # ID of the gist used to save run results
+  # ID of the gist used to save run results - create a gist under the github_user (secret or not) and grab the id - https://gist.github.com/name/id
   gist_id: YOUR_GIST_ID_CREATE_GIST_SAVE_ID_HERE
 
   # Chocolatey API key - to push updated packages

setup/au_setup.ps1

@@ -25,7 +25,7 @@
 # Chocolatey API key - to push updated packages
 `$env:api_key         = 'YOUR_CHOCO_API_KEY_HERE'
 
-# ID of the gist used to save run results
+# ID of the gist used to save run results - create a gist under the github_user (secret or not) and grab the id - https://gist.github.com/name/id
 `$env:gist_id         = 'YOUR_GIST_ID_CREATE_GIST_SAVE_ID_HERE'
 "@ | Out-File $PSScriptRoot\..\au\update_vars.ps1 -NoClobber