minor #41888 added missing Arabic translations (ELATTARIYassine)

This PR was merged into the 4.4 branch.

Discussion
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added missing Arabic translations

| Q             | A
| ------------- | ---
| Branch?       | 4.4
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Tickets       | Fix #... <!-- prefix each issue number with "Fix #", no need to create an issue if none exist, explain below instead -->
| License       | MIT
| Doc PR        | symfony/symfony-docs#...

Related to #41811

Commits
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f549d9cd9c added missing Arabic translations

Author: fabpot

Resources/translations/validators.ar.xlf

@@ -386,6 +386,10 @@
                 <source>This value is not a valid International Securities Identification Number (ISIN).</source>
                 <target> صالح (ISIN) هذه القيمة ليست رقم تعريف الأوراق المالية الدولي.</target>
             </trans-unit>
+            <trans-unit id="100">
+                <source>This value should be a valid expression.</source>
+                <target>يجب أن تكون هذه القيمة تعبيرًا صالحًا.</target>
+            </trans-unit>
         </body>
     </file>
 </xliff>