minor #1067 Fix wrong reference to mount method (Jasperator)

This PR was merged into the 2.x branch.

Discussion
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Fix wrong reference to mount method

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| License       | MIT

There was a reference to a not existing mount method in the ux live component documentation. This should be a link that leads to the mount method in the ux twig documentation.

Commits
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ac6abbe Fix wrong reference to mount method

src/LiveComponent/doc/index.rst

@@ -2506,7 +2506,7 @@ changes, the child will make a second Ajax request to re-render itself.
     To work, the name of the prop that's passed when rendering the ``TodoFooter``
     component must match the property name that has the ``updateFromParent`` - e.g.
     ``{{ component('TodoFooter', { count: todos|length }) }}``. If you pass in a
-    different name and set the ``count`` property via a ref:``mount()`` method, the
+    different name and set the ``count`` property via a `mount() <https://symfony.com/bundles/ux-twig-component/current/index.html#the-mount-method>`_ method, the
     child component will not re-render correctly.
 
 Child components keep their modifiable LiveProp values