Update README.md

Elasticsearch is not a camel-cased name.

Author: jasonkuhrt

README.md

@@ -1,7 +1,7 @@
-## ElasticSearch Dockerfile
+## Elasticsearch Dockerfile
 
 
-This repository contains **Dockerfile** of [ElasticSearch](http://www.elasticsearch.org/) for [Docker](https://www.docker.com/)'s [automated build](https://registry.hub.docker.com/u/dockerfile/elasticsearch/) published to the public [Docker Hub Registry](https://registry.hub.docker.com/).
+This repository contains **Dockerfile** of [Elasticsearch](http://www.elasticsearch.org/) for [Docker](https://www.docker.com/)'s [automated build](https://registry.hub.docker.com/u/dockerfile/elasticsearch/) published to the public [Docker Hub Registry](https://registry.hub.docker.com/).
 
 
 ### Base Docker Image
@@ -26,7 +26,7 @@ This repository contains **Dockerfile** of [ElasticSearch](http://www.elasticsea
 
   1. Create a mountable data directory `<data-dir>` on the host.
 
-  2. Create ElasticSearch config file at `<data-dir>/elasticsearch.yml`.
+  2. Create Elasticsearch config file at `<data-dir>/elasticsearch.yml`.
 
     ```yml
     path: