minor symfony#53069 Add missing FR translation (smnandre)

This PR was squashed before being merged into the 5.4 branch.

Discussion
----------

Add missing FR translation

| Q             | A
| ------------- | ---
| Branch?       | 5.4
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Issues        | Fix symfony#53026
| License       | MIT

```
The extension of the file is invalid ({{ extension }}). Allowed extensions are {{ extensions }}.
```

Commits
-------

1890ef2 Add missing FR translation

Author: fabpot

src/Symfony/Component/Validator/Resources/translations/validators.fr.xlf

@@ -426,6 +426,10 @@
                 <source>Using hidden overlay characters is not allowed.</source>
                 <target>Utiliser des caractères de superposition cachés n'est pas autorisé.</target>
             </trans-unit>
+            <trans-unit id="110">
+                <source>The extension of the file is invalid ({{ extension }}). Allowed extensions are {{ extensions }}.</source>
+                <target>L'extension du fichier est invalide ({{ extension }}). Les extensions autorisées sont {{ extensions }}.</target>
+            </trans-unit>
         </body>
     </file>
 </xliff>