minor symfony#53435 [Validator] Added missing Finnish, Italian, and Serbian Cyryllic translations (thunderer)

This PR was merged into the 5.4 branch.

Discussion
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[Validator] Added missing Finnish, Italian, and Serbian Cyryllic translations

| Q             | A
| ------------- | ---
| Branch?       | 5.4
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Issues        | Fix symfony#53292, Fix symfony#53288, Fix symfony#53300
| License       | MIT

Added missing translations with help from a professional translator.

Commits
-------

ba811a8 [Validator] added missing Finnish, Italian, and Serbian Cyryllic translations

Author: nicolas-grekas

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

@@ -432,11 +432,11 @@
             </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>Havaittu merkistö on virheellinen ({{ detected }}). Sallitut merkistöt ovat {{ 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>Tämä ei ole kelvollinen MAC-osoite.</target>
             </trans-unit>
         </body>
     </file>

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

@@ -432,11 +432,11 @@
             </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>La codifica dei caratteri rilevata non è valida ({{ detected }}). Le codifiche ammesse sono {{ 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>Questo non è un indirizzo MAC valido.</target>
             </trans-unit>
         </body>
     </file>

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

@@ -432,11 +432,11 @@
             </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>Откривено кодирање знакова је неважеће ({{ detected }}). Дозвољена кодирања су {{  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>Ово није важећа MAC-адреса.</target>
             </trans-unit>
         </body>
     </file>