Update logout.adoc: Fix Customizing Logout Success Example

Author: asimuleo

docs/modules/ROOT/pages/servlet/authentication/logout.adoc

@@ -315,7 +315,7 @@ While using `logoutSuccessUrl` will suffice for most cases, you may need to do s
 For example, instead of redirecting, you may want to only return a status code.
 In this case, you can provide a success handler instance, like so:
 
-.Using Clear-Site-Data to Clear Cookies
+.Using HttpStatusReturningLogoutSuccessHandler to return a status code
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