minor symfony#53196 [Validator] Add missing italian translation (marac19901990)

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

Discussion
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[Validator] Add missing italian translation

[…y/issues/53117](symfony#53117)

| Q             | A
| ------------- | ---
| Branch?       | 5.4
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Issues        | Fix symfony#53117
| License       | MIT

Added missing italian translation as per issue linked above

Commits
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41359d9 [Validator] Add missing italian translation

Author: fabpot

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

@@ -426,6 +426,10 @@
                 <source>Using hidden overlay characters is not allowed.</source>
                 <target>Non è consentito utilizzare caratteri sovrapposti nascosti.</target>
             </trans-unit>
+            <trans-unit id="110">
+                <source>The extension of the file is invalid ({{ extension }}). Allowed extensions are {{ extensions }}.</source>
+                <target>L'estensione del file non è valida ({{ extension }}). Le estensioni consentite sono {{ extensions }}.</target>
+            </trans-unit>
         </body>
     </file>
 </xliff>