Update src/guides/v2.4/graphql/mutations/contact-us.md

Co-authored-by: Kevin Harper <keharper@users.noreply.github.com>

Author: dobooth

src/guides/v2.4/graphql/mutations/contact-us.md

@@ -4,7 +4,7 @@ title: contactUs mutation
 pwa_only: true
 ---
 
-The `contactUs` mutation allows a Contact Us form to display on the site.
+The `contactUs` mutation submits the contents of the Contact Us form.
 
 ## Syntax