Update README.adoc

Author: abrokenjester

README.adoc

@@ -5,6 +5,16 @@ This repository is part of the http://www.rdf4j.org/[Eclipse RDF4J] project. It
 
 http://www.rdf4j.org/[Eclipse RDF4J] (formerly known as Sesame) is a powerful Java framework for processing and handling RDF data. This includes creating, parsing, scalable storage, reasoning and querying with RDF and Linked Data. It offers an easy-to-use API that can be connected to all leading RDF database solutions. 
 
+Contribute to the Documentation
+-------
+
+Spotted a typo? Have something else to improve or fix in the documentation? Great! We love to receive your fixes and improvements! Before you start editing, please make sure that:
+
+1. you have signed the Eclipse Contributor License Agreement (CLA);
+2. you know how to 'sign off' every commit do.
+
+You can find more details about this in the https://github.com/eclipse/rdf4j-doc/blob/master/.github/CONTRIBUTING.md[Contributor guidelines for the RDF4J Documentation].
+
 License
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