minor symfony#53344 [Validator] Added missing Polish translation (thunderer)

This PR was merged into the 5.4 branch.

Discussion
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[Validator] Added missing Polish translation

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

Added missing Polish translation. I'm a Polish native speaker.

Commits
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9123a85 [Validator] added missing Polish translation

Author: nicolas-grekas

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

@@ -434,6 +434,10 @@
                 <source>The detected character encoding is invalid ({{ detected }}). Allowed encodings are {{ encodings }}.</source>
                 <target>Wykryte kodowanie znaków ({{ detected }}) jest nieprawidłowe. Dozwolone kodowania to {{ encodings }}.</target>
             </trans-unit>
+            <trans-unit id="112">
+                <source>This is not a valid MAC address.</source>
+                <target>Podana wartość nie jest poprawnym adresem MAC.</target>
+            </trans-unit>
         </body>
     </file>
 </xliff>