Merge branch '5.4' into 6.2

* 5.4:
  Tweaks
  [FormCollection] mention Symfony UX live collection

Author: javiereguiluz

form/form_collections.rst

@@ -213,6 +213,12 @@ Previously you added two tags to your task in the controller. Now let the users
 add as many tag forms as they need directly in the browser. This requires a bit
 of JavaScript code.
 
+.. tip::
+
+    Instead of writing the needed JavaScript code yourself, you can use Symfony
+    UX to implement this feature with only PHP and Twig code. See the
+    `Symfony UX Demo of Form Collections`_.
+
 But first, you need to let the form collection know that instead of exactly two,
 it will receive an *unknown* number of tags. Otherwise, you'll see a
 *"This form should not contain extra fields"* error. This is done with the
@@ -702,4 +708,5 @@ the relationship between the removed ``Tag`` and ``Task`` object.
 .. _`@a2lix/symfony-collection`: https://github.com/a2lix/symfony-collection
 .. _`symfony-collection`: https://github.com/ninsuo/symfony-collection
 .. _`ArrayCollection`: https://www.doctrine-project.org/projects/doctrine-collections/en/1.6/index.html
+.. _`Symfony UX Demo of Form Collections`: https://ux.symfony.com/live-component/demos/form-collection-type
 .. _`Stimulus`: https://symfony.com/doc/current/frontend/encore/simple-example.html#stimulus-symfony-ux