(chocolatey#2443) Update comment about chocolatey profile

This commit updates the injection of importing the chocolatey
profile to include extra comment details to mention what the
import of the module is used for.

nuget/chocolatey/tools/chocolateysetup.psm1

@@ -612,7 +612,11 @@ function Add-ChocolateyProfile {
 
     $profileInstall = @'
 
-# Chocolatey profile
+# Import the Chocolatey Profile that contains the necessary code to enable
+# tab-completions to function for `choco`.
+# Be aware that if you are missing these lines from you profile, tab completion
+# for `choco` wil not function.
+# See https://ch0.co/tab-completion for details.
 $ChocolateyProfile = "$env:ChocolateyInstall\helpers\chocolateyProfile.psm1"
 if (Test-Path($ChocolateyProfile)) {
   Import-Module "$ChocolateyProfile"