[Translation] Added a missing versionadded directive

Author: javiereguiluz

translation.rst

@@ -472,6 +472,10 @@ The ``translation:extract`` command looks for missing translations in:
 
         $ composer require nikic/php-parser
 
+    .. versionadded:: 6.2
+
+        The AST parser support was introduced in Symfony 6.2.
+
 .. _translation-resource-locations:
 
 Translation Resource/File Names and Locations