(doc) Change command output to be consistent

In other commands, when the package exit code is only available when
the UseEnhancedExitCodes feature is enabled, it is marked with
"(enhanced)".  This was missing on this command, and this commit
addresses this.

src/chocolatey/infrastructure.app/commands/ChocolateyOutdatedCommand.cs

@@ -130,7 +130,7 @@ Exit codes that normally result from running this command.
 Enhanced:
  - 0: no outdated packages
  - -1 or 1: an error has occurred
- - 2: outdated packages have been found
+ - 2: outdated packages have been found (enhanced)
 
 NOTE: If you have the feature '{0}' turned on,
  then choco will provide enhanced exit codes that allow