minor #18531 Fixing typo (ThomasLandauer)

This PR was merged into the 6.3 branch.

Discussion
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Fixing typo

Page: https://symfony.com/doc/current/frontend/asset_mapper.html

Commits
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23a08b9 Fixing typo

Author: javiereguiluz

frontend/asset_mapper.rst

@@ -34,7 +34,7 @@ To install the AssetMapper component, run:
 
     $ composer require symfony/asset-mapper symfony/asset symfony/twig-pack
 
-In addition to ``symfony/asset-mapper`, this also makes sure that you have the
+In addition to ``symfony/asset-mapper``, this also makes sure that you have the
 :doc:`Asset Component </components/asset>` and Twig available.
 
 If you're using :ref:`Symfony Flex <symfony-flex>`, you're done! The recipe just