Fix duplicated use-authorization-manager in docs

Signed-off-by: 박기현\qkrrl <qkrrlgus114@naver.com>

Author: qkrrlgus114

docs/modules/ROOT/pages/servlet/appendix/namespace/http.adoc

@@ -34,7 +34,7 @@ The attributes on the `<http>` element control some of the properties on the cor
 Use AuthorizationManager API instead of SecurityMetadataSource (defaults to true)
 
 [[nsa-http-authorization-manager-ref]]
-* **use-authorization-manager**
+* **authorization-manager-ref**
 Use this AuthorizationManager instead of deriving one from <intercept-url> elements
 
 [[nsa-http-access-decision-manager-ref]]