[DOC] I missed one more Elasticsearch...

This is a one-line fix.

Fixes elastic#3015

docs/asciidoc/static/include/pluginbody.asciidoc

@@ -827,7 +827,7 @@ Gem::Specification.new do |s|
   s.licenses = ['Apache License (2.0)']
   s.summary = "This {plugintype} does x, y, z in Logstash"
   s.description = "This gem is a logstash plugin required to be installed on top of the Logstash core pipeline using $LS_HOME/bin/plugin install gemname. This gem is not a stand-alone program"
-  s.authors = ["Elasticsearch"]
+  s.authors = ["Elastic"]
   s.email = '[email protected]'
   s.homepage = "http://www.elastic.co/guide/en/logstash/current/index.html"
   s.require_paths = ["lib"]