minor #2058 [Map] Fix doc link (smnandre)

This PR was merged into the 2.x branch.

Discussion
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[Map] Fix doc link

As `https://symfony.com/ux` now redirects to the "FrontEnd page" of Symfony docs --that _barely_ mention Symfony UX-- i think directing users to the website could be less missleading.

Commits
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1cb5dc8 [Map] Fix doc link

src/Map/doc/index.rst

@@ -216,7 +216,7 @@ This bundle aims at following the same Backward Compatibility promise as
 the Symfony framework:
 https://symfony.com/doc/current/contributing/code/bc.html
 
-.. _`the Symfony UX initiative`: https://symfony.com/ux
+.. _`the Symfony UX initiative`: https://ux.symfony.com/
 .. _StimulusBundle configured in your app: https://symfony.com/bundles/StimulusBundle/current/index.html
 .. _`Google`: https://github.com/symfony/symfony-ux/blob/{version}/src/Map/src/Bridge/Google/README.md
 .. _`Leaflet`: https://github.com/symfony/symfony-ux/blob/{version}/src/Map/src/Bridge/Leaflet/README.md