Replace New and Noteworthy with links to release notes.

Closes #1609
See spring-projects/spring-data-relational#1351

Author: schauder

README.adoc

@@ -138,7 +138,6 @@ Having trouble with Spring Data? We’d love to help!
 https://docs.spring.io/spring-data/couchbase/docs/current/reference/html/[reference documentation], and https://docs.spring.io/spring-data/couchbase/docs/current/api/[Javadocs].
 * Learn the Spring basics – Spring Data builds on Spring Framework, check the https://spring.io[spring.io] web-site for a wealth of reference documentation.
 If you are just starting out with Spring, try one of the https://spring.io/guides[guides].
-* If you are upgrading, check out the https://docs.spring.io/spring-data/couchbase/docs/current/changelog.txt[changelog] for "`new and noteworthy`" features.
 * Ask a question - we monitor https://stackoverflow.com[stackoverflow.com] for questions tagged with https://stackoverflow.com/tags/spring-data[`spring-data-couchbase`].
 You can also chat with the community on https://gitter.im/spring-projects/spring-data[Gitter].
 * Report bugs with Spring Data Couchbase at https://jira.spring.io/browse/DATACOUCH[jira.spring.io/browse/DATACOUCH].

src/main/asciidoc/index.adoc

@@ -11,6 +11,7 @@ NOTE: Copies of this document may be made for your own use and for distribution
 toc::[]
 
 include::preface.adoc[]
+include::{spring-data-commons-docs}/upgrade.adoc[leveloffset=+1]
 
 [[reference]]
 = Reference Documentation