Fix internal cross reference

Changed syntax and defined an anchor explicitly for the section. The
link was broken on the PDF rendering otherwise.

Author: acogoluegnes

src/docs/asciidoc/getting-started.adoc

@@ -210,6 +210,7 @@ For Maven:
 </repositories>
 --------
 
+[#versioning]
 ==== Versioning
 
 Reactor RabbitMQ used https://semver.org/[semantic versioning] from version 1.0 to

src/docs/asciidoc/new.adoc

@@ -5,7 +5,7 @@
 === What's new in Reactor RabbitMQ 1.4.1
 
 * Support exchange-to-exchange binding and unbinding
-* Change in link:#_versioning[versioning scheme]: Reactor RabbitMQ does not follow semantic versioning anymore,
+* Change in <<versioning,versioning scheme>>: Reactor RabbitMQ does not follow semantic versioning anymore,
 it uses now a `GENERATION.MAJOR.MINOR` scheme, for consistency with the other Reactor libraries
 
 === What's new in Reactor RabbitMQ 1.4