add missing translation for uuid validator

Author: garak

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

@@ -314,6 +314,10 @@
                 <source>This is not a valid Business Identifier Code (BIC).</source>
                 <target>Questo valore non è un codice BIC valido.</target>
             </trans-unit>
+            <trans-unit id="82">
+                <source>This is not a valid UUID.</source>
+                <target>Questo non è un UUID valido.</target>
+            </trans-unit>
         </body>
     </file>
 </xliff>