minor #2355 [Site] fix typo on cookbook index (kbond)

This PR was merged into the 2.x branch.

Discussion
----------

[Site] fix typo on cookbook index

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| Issues        | n/a
| License       | MIT

<!--
Replace this notice by a description of your feature/bugfix.
This will help reviewers and should be a good start for the documentation.

Additionally (see https://symfony.com/releases):
 - Always add tests and ensure they pass.
 - For new features, provide some code snippets to help understand usage.
 - Features and deprecations must be submitted against branch main.
 - Changelog entry should follow https://symfony.com/doc/current/contributing/code/conventions.html#writing-a-changelog-entry
 - Never break backward compatibility (see https://symfony.com/bc).
-->

Commits
-------

eece91c [Site] fix typo on cookbook index

ux.symfony.com/templates/cookbook/index.html.twig

@@ -3,7 +3,7 @@
 {% set meta = {
     title: 'Cookbook',
     title_suffix: ' - Symfony UX',
-    description: 'Symfony UX cookbook - Concrete exeample to understantd all the concepts and components of Symfony UX',
+    description: 'Symfony UX Cookbook - Concrete examples to understantd all the concepts and components of Symfony UX.',
     canonical: url('app_cookbook'),
 } %}