[nats] Release v2.6.0
[nats] Release v2.6.0

Details can be found [here](https://github.com/nats-io/nats-server/releases/tag/v2.6.0)

Signed-off-by: Ivan Kozlovic <a15f8b81a160b4eebe5c84e9e3b65c87b9b2f18e@synadia.com>

Bonitasoft-Community/docker_docs,docker-library/docs,Lightstreamer/docs,docker-library/docs,Bonitasoft-Community/docker_docs,jetty-project/docker-docs,docker-solr/docs,nats-io/docker-docs,crate/docker-docs,docker-solr/docs,nats-io/docker-docs,infosiftr/docker-library-docs,jetty-project/docker-docs,Lightstreamer/docs,crate/docker-docs,infosiftr/docker-library-docs