Typo

Replaced 'introduce' by  'introduced'.

Author: askeita

components/ldap.rst

@@ -163,7 +163,7 @@ delete existing ones::
 .. versionadded:: 5.3
 
     The option to make attribute names case-insensitive in ``getAttribute()``
-    and ``hasAttribute()`` was introduce in Symfony 5.3.
+    and ``hasAttribute()`` was introduced in Symfony 5.3.
 
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