minor #43320 [Security][Validator] Add missing translations for Gallician (gl) (afaricamp)

This PR was squashed before being merged into the 4.4 branch.

Discussion
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[Security][Validator] Add missing translations for Gallician (gl)

| Q             | A
| ------------- | ---
| Branch?      | 4.4
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Tickets       | Fix #41044
| License       | MIT
| Doc PR        | symfony/symfony-docs#...
Added missing Gallician translation units for security and validators.

Commits
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3a754be7af [Security][Validator] Add missing translations for Gallician (gl)

Author: fabpot

Resources/translations/validators.gl.xlf

@@ -386,6 +386,10 @@
                 <source>This value is not a valid International Securities Identification Number (ISIN).</source>
                 <target>Este valor non é un número de identificación de valores internacionais (ISIN) válido.</target>
             </trans-unit>
+            <trans-unit id="100">
+                <source>This value should be a valid expression.</source>
+                <target>Este valor debe ser unha expresión válida.</target>
+            </trans-unit>
         </body>
     </file>
 </xliff>