HttpSession and RESTful APIs documentation bug

[cbot59]

Describe the bug
Unable to render Spring Configuration and Servlet Container Initialization sections properly

To Reproduce

1. Open https://docs.spring.io/spring-session/reference/http-session.html#httpsession-rest
2. Spring Configuration section shows Unresolved include directive in modules ...
3. Servlet Container Initialization section shows Unresolved include directive in modules ...

Expected behavior
Render the adoc properly

Sample