AuthorizationManager method security documentation should use AnnotationMatchingPointcut

[jzheaux]

The documentation currently uses AnnotationMethodMatcher, but this is incorrect. The code requires a Pointcut.

[andresbermeoq]

Hello @jzheaux. You could help me by assigning me this issue.

[jzheaux]

Sorry I missed your message, @andresbermeoq. Are you still interested in contributing to this issue? A PR would be much appreciated.