minor symfony#53053 Add missing translation into validators.pl.xlf (stloyd)

This PR was merged into the 5.4 branch.

Discussion
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Add missing translation into validators.pl.xlf

| Q             | A
| ------------- | ---
| Branch?       | 5.4
| Bug fix?      | yes
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Issues        | Fix symfony#53038 <!-- prefix each issue number with "Fix #", no need to create an issue if none exists, explain below instead -->
| License       | MIT

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Commits
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ce3baf4 Add missing translation into validators.pl.xlf

Author: fabpot

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

@@ -426,6 +426,10 @@
                 <source>Using hidden overlay characters is not allowed.</source>
                 <target>Używanie ukrytych znaków nakładki jest niedozwolone.</target>
             </trans-unit>
+            <trans-unit id="110">
+                <source>The extension of the file is invalid ({{ extension }}). Allowed extensions are {{ extensions }}.</source>
+                <target>Rozszerzenie pliku jest nieprawidłowe ({{ extension }}). Dozwolone rozszerzenia to {{ extensions }}.</target>
+            </trans-unit>
         </body>
     </file>
 </xliff>