Update Golang documentation to use latest stable version (1.13)
Update Golang documentation to use latest stable version (1.13)

Signed-off-by: Jean-Baptiste Le Duigou <1192d395a0e64e4b5d6bff0af6c05f52561bf6e3@gmail.com>

nats-io/docker-docs,31z4/docs,Lightstreamer/docs,docker-solr/docs,Bonitasoft-Community/docker_docs,avoinea/docs,nats-io/docker-docs,odoo/docker-docs,infosiftr/docker-library-docs,avoinea/docs,odoo/docker-docs,Bonitasoft-Community/docker_docs,tilosp-docker/library-docs,crate/docker-docs,crate/docker-docs,tilosp-docker/library-docs,docker-solr/docs,jetty-project/docker-docs,jetty-project/docker-docs,docker-library/docs,31z4/docs,docker-library/docs,Lightstreamer/docs,infosiftr/docker-library-docs