Update command for brew audit

Author: NolanTrem

Diff for: CONTRIBUTING.md

@@ -26,7 +26,7 @@ Thanks for contributing!
 
 * read [the Formula Cookbook](https://docs.brew.sh/Formula-Cookbook) or: `brew create $URL` and make edits
 * `HOMEBREW_NO_INSTALL_FROM_API=1 brew install --build-from-source foo`
-* `brew audit --new-formula foo`
+* `brew audit --new foo`
 * `git commit` with message formatted `foo 2.3.4 (new formula)`
 * [open a pull request](https://docs.brew.sh/How-To-Open-a-Homebrew-Pull-Request) and fix any failing tests