minor symfony#53415 [Validator] added missing Czech translations (thunderer)

This PR was merged into the 5.4 branch.

Discussion
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[Validator] added missing Czech translations

| Q             | A
| ------------- | ---
| Branch?       | 5.4
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Issues        | Fix symfony#53021
| License       | MIT

Added missing translations with help from a professional translator.

Commits
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dcc5e0b [Validator] added missing Czech translations

Author: nicolas-grekas

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

@@ -428,15 +428,15 @@
             </trans-unit>
             <trans-unit id="110">
                 <source>The extension of the file is invalid ({{ extension }}). Allowed extensions are {{ extensions }}.</source>
-                <target state="needs-translation">The extension of the file is invalid ({{ extension }}). Allowed extensions are {{ extensions }}.</target>
+                <target>Přípona souboru je neplatná ({{ extension }}). Povolené přípony jsou {{ extensions }}.</target>
             </trans-unit>
             <trans-unit id="111">
                 <source>The detected character encoding is invalid ({{ detected }}). Allowed encodings are {{ encodings }}.</source>
-                <target state="needs-translation">The detected character encoding is invalid ({{ detected }}). Allowed encodings are {{ encodings }}.</target>
+                <target>Zjištěné kódování znaků je neplatné ({{ detected }}). Povolená kódování jsou {{ encodings }}.</target>
             </trans-unit>
             <trans-unit id="112">
                 <source>This is not a valid MAC address.</source>
-                <target state="needs-translation">This is not a valid MAC address.</target>
+                <target>Tohle není platná MAC adresa.</target>
             </trans-unit>
         </body>
     </file>