[#41846] Fix typo in opening tag

Author: wouterj

Tests/DependencyInjection/Fixtures/xml/logout_delete_cookies.xml

@@ -8,7 +8,7 @@
         http://symfony.com/schema/dic/security
         https://symfony.com/schema/dic/security/security-1.0.xsd">
 
-    <sec:config enable-authenticator-manager="true">
+    <config enable-authenticator-manager="true">
         <provider name="default" id="foo" />
 
         <firewall name="main" provider="default">