docs: add options for enhance update

packages/kit/src/runtime/app/forms.js

@@ -63,6 +63,9 @@ function clone(element) {
  * - redirects to the nearest error page in case of an unexpected error
  *
  * If you provide a custom function with a callback and want to use the default behavior, invoke `update` in your callback.
+ * It accepts an options object
+ * - `reset: false` if you don't want the `<form>` values to be reset after a successful submission
+ * - `invalidateAll: false` if you don't want the action to call `invalidateAll` after submission
  * @template {Record<string, unknown> | undefined} Success
  * @template {Record<string, unknown> | undefined} Failure
  * @param {HTMLFormElement} form_element The form element

packages/kit/types/index.d.ts

@@ -2027,6 +2027,9 @@ declare module '$app/forms' {
 	 * - redirects to the nearest error page in case of an unexpected error
 	 *
 	 * If you provide a custom function with a callback and want to use the default behavior, invoke `update` in your callback.
+	 * It accepts an options object
+	 * - `reset: false` if you don't want the `<form>` values to be reset after a successful submission
+	 * - `invalidateAll: false` if you don't want the action to call `invalidateAll` after submission
 	 * @param form_element The form element
 	 * @param submit Submit callback
 	 */