Fix Typo in Reference Docs

[dongmyo]

Summary

a typo error in spring security reference
not JacksonJacksonModules but SecurityJacksonModules

https://github.com/spring-projects/spring-security/blob/master/docs/manual/src/docs/asciidoc/_includes/servlet/architecture/jackson.adoc

Actual Behavior

To use it, register the JacksonJacksonModules.getModules(ClassLoader) ...

Expected Behavior

To use it, register the SecurityJacksonModules.getModules(ClassLoader) ...

Version

5.1.1.RELEASE

[jzheaux]

@dongmyo, thanks for the report! Would you like to submit a PR with the correction?