app.md: target: should be used with a template comment

doc/cask_language_reference/stanzas/app.md

@@ -40,4 +40,4 @@ The `target:` key works similarly for most Cask artifacts, such as `app`, `binar
 
 ## target: Should Only Be Used in Select Cases
 
-Don’t use `target:` for aesthetic reasons, like removing version numbers (`app "Slack #{version}.app", target: 'Slack.app'`). With `app`, use it when it makes sense functionally and document your reason clearly in the Cask: was it [for clarity](https://github.com/caskroom/homebrew-cask/blob/312ae841f1f1b2ec07f4d88b7dfdd7fbdf8d4f94/Casks/imagemin.rb#L12); [for consistency](https://github.com/caskroom/homebrew-cask/blob/d2a6b26df69fc28c4d84d6f5198b2b652c2f414d/Casks/devonthink-pro-office.rb#L16); [to prevent conflicts](https://github.com/caskroom/homebrew-cask/blob/bd6dc1a64e0bdd35ba0e20789045ea023b0b6aed/Casks/flash-player-debugger.rb#L11); [due to developer suggestion](https://github.com/caskroom/homebrew-cask/blob/ff3e9c4a6623af44b8a071027e8dcf3f4edfc6d9/Casks/kivy.rb#L12)?
+Don’t use `target:` for aesthetic reasons, like removing version numbers (`app "Slack #{version}.app", target: 'Slack.app'`). Use it when it makes sense functionally and document your reason clearly in the Cask, using one of the templates: [for clarity](https://github.com/caskroom/homebrew-cask/blob/312ae841f1f1b2ec07f4d88b7dfdd7fbdf8d4f94/Casks/imagemin.rb#L12); [for consistency](https://github.com/caskroom/homebrew-cask/blob/d2a6b26df69fc28c4d84d6f5198b2b652c2f414d/Casks/devonthink-pro-office.rb#L16); [to prevent conflicts](https://github.com/caskroom/homebrew-cask/blob/bd6dc1a64e0bdd35ba0e20789045ea023b0b6aed/Casks/flash-player-debugger.rb#L11); [due to developer suggestion](https://github.com/caskroom/homebrew-cask/blob/ff3e9c4a6623af44b8a071027e8dcf3f4edfc6d9/Casks/kivy.rb#L12).