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

This PR was merged into the 2.x branch.

Discussion
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[Site] fix typo on cookbook index

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

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Commits
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eece91c [Site] fix typo on cookbook index

Author: kbond

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'),
 } %}