minor #1186 Fix link to UX packages list in README (jmsche)

This PR was merged into the 2.x branch.

Discussion
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Fix link to UX packages list in README

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| Tickets       | N/A
| License       | MIT

Commits
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6e479e0 Fix link to UX packages list in README

Author: weaverryan

README.md

@@ -22,7 +22,7 @@ or with [AssetMapper](https://symfony.com/doc/current/frontend/asset_mapper.html
 ## Resources
 
 -   [Install Symfony UX](https://symfony.com/doc/current/frontend/ux.html).
--   [List of UX Packages](https://symfony.com/doc/current/frontend/ux.html#ux-packages-list).
+-   [List of UX Packages](https://symfony.com/bundles/StimulusBundle/current/index.html#the-ux-packages).
 -   [Symfony UX Official Demo](https://ux.symfony.com).
 -   Watch the [Stimulus Screencast on SymfonyCasts](https://symfonycasts.com/screencast/stimulus).