[docs] mention formulae and casks

docs/Adding-Software-to-Homebrew.md

@@ -8,7 +8,7 @@ Before you start, please check the open pull requests for [Homebrew/homebrew-cor
 
 Next, you will want to go through the [Acceptable Formulae](Acceptable-Formulae.md) or [Acceptable Casks](Acceptable-Casks.md) documentation to determine if the software is an appropriate addition to Homebrew. If you are creating a formula for an alternative version of software already in Homebrew (e.g. a major/minor version that differs significantly from the existing version), be sure to read the [Versions](Versions.md) documentation to understand versioned formulae requirements.
 
-If everything checks out, you're ready to get started on a new formula!
+If everything checks out, you're ready to get started on a new formula / cask!
 
 **Note:** For updating an existing formula or cask, refer to the guidelines on 'submitting a new version of a [formula](How-To-Open-a-Homebrew-Pull-Request.md#submit-a-new-version-of-an-existing-formula) / [cask](How-To-Open-a-Homebrew-Pull-Request.md#submit-a-new-version-of-an-existing-cask)' respectively.