docs: capitalize 'Actions' in form.md

Capitalize React Actions concept per style guide (#6713).

- 'actions' → 'Actions' when referring to the React concept
- Keep lowercase for general programming terms and parameter names

Author: vedparkasharya

src/content/reference/react-dom/components/form.md

@@ -334,7 +334,7 @@ Learn more about updating state from a form action with the [`useActionState`](/
 
 ### Handling multiple submission types {/*handling-multiple-submission-types*/}
 
-Forms can be designed to handle multiple submission actions based on the button pressed by the user. Each button inside a form can be associated with a distinct action or behavior by setting the `formAction` prop.
+Forms can be designed to handle multiple submission Actions based on the button pressed by the user. Each button inside a form can be associated with a distinct action or behavior by setting the `formAction` prop.
 
 When a user taps a specific button, the form is submitted, and a corresponding action, defined by that button's attributes and action, is executed. For instance, a form might submit an article for review by default but have a separate button with `formAction` set to save the article as a draft.