Bug: Forms are reset when action fails

[OliverJAsh]

React version: 19.2.1

Steps To Reproduce

1. Enter some text into the input and submit. The action will fail.

Link to code example:

https://codesandbox.io/p/sandbox/suspicious-artem-vdplnn?file=%2Fsrc%2FApp.js%3A4%2C20

The current behavior

The form is reset.

The expected behavior

The form is not reset when the action fails. The docs suggest that reset should only happen when the action is successful:

After the action function succeeds, all uncontrolled field elements in the form are reset.

Related: #29034