minor #1019 [Docs] Fix AssetMapper link (asispts)

This PR was merged into the 2.x branch.

Discussion
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[Docs] Fix AssetMapper link

This PR will fix `AssetMapper` link in this page https://symfony.com/bundles/StimulusBundle/current/index.html

Commits
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30de34f Fix AssetMapper link

src/StimulusBundle/doc/index.rst

@@ -500,7 +500,7 @@ it will normalize it:
 .. _`@symfony/stimulus-bridge`: https://github.com/symfony/stimulus-bridge
 .. _`Stimulus`: https://stimulus.hotwired.dev/
 .. _`Webpack Encore`: https://symfony.com/doc/current/frontend.html
-.. _`AssetMapper`: https://symfony.com/doc/current/frontend/asset-mapper.html
+.. _`AssetMapper`: https://symfony.com/doc/current/frontend/asset_mapper.html
 .. _`Stimulus Controllers & Values`: https://stimulus.hotwired.dev/reference/values
 .. _`CSS Classes`: https://stimulus.hotwired.dev/reference/css-classes
 .. _`Outlets`: https://stimulus.hotwired.dev/reference/outlets