Mention that uncontrolled form elements are reset by form actions (#7340)

Author: jeremy-deutsch

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

@@ -50,7 +50,7 @@ To create interactive controls for submitting information, render the [built-in
 
 ### Handle form submission on the client {/*handle-form-submission-on-the-client*/}
 
-Pass a function to the `action` prop of form to run the function when the form is submitted. [`formData`](https://developer.mozilla.org/en-US/docs/Web/API/FormData) will be passed to the function as an argument so you can access the data submitted by the form. This differs from the conventional [HTML action](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/form#action), which only accepts URLs.
+Pass a function to the `action` prop of form to run the function when the form is submitted. [`formData`](https://developer.mozilla.org/en-US/docs/Web/API/FormData) will be passed to the function as an argument so you can access the data submitted by the form. This differs from the conventional [HTML action](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/form#action), which only accepts URLs. After the `action` function succeeds, all uncontrolled field elements in the form are reset.
 
 <Sandpack>