minor #17841 [Routing] Minor (ThomasLandauer)

This PR was merged into the 5.4 branch.

Discussion
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[Routing] Minor

Page: https://symfony.com/doc/5.4/routing.html

Reason: Might be misunderstood as "unique throughout the entire project"

It's explained 2 paragraphs further down:

> Routes can define any number of parameters, but each of them can only be used once on each route

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Commits
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201b622 Minor

Author: javiereguiluz

routing.rst

@@ -498,9 +498,8 @@ However, it's common to define routes where some parts are variable. For example
 the URL to display some blog post will probably include the title or slug
 (e.g. ``/blog/my-first-post`` or ``/blog/all-about-symfony``).
 
-In Symfony routes, variable parts are wrapped in ``{ ... }`` and they must have
-a unique name. For example, the route to display the blog post contents is
-defined as ``/blog/{slug}``:
+In Symfony routes, variable parts are wrapped in ``{ }``.
+For example, the route to display the blog post contents is defined as ``/blog/{slug}``:
 
 .. configuration-block::