SpringBoot Fix links to Servlet and JPA javadoc

Reference javadoc links go to 404 page

Any Servlet, Filter...

Reference https://docs.spring.io/spring-boot/reference/web/servlet.html#web.servlet.embedded-container.servlets-filters-listeners.beans

...To get started, create some repository interfaces to handle your @Entity objects.

Reference https://docs.spring.io/spring-boot/how-to/data-access.html#howto.data-access.spring-data-repositories

Comment From: wilkinsona

Thanks very much, @ngocnhan-tran1996.