update documentation with release 2.5.1

Author: dadoonet

README.md

@@ -7,7 +7,7 @@ for the unicast discovery mechanism and add S3 repositories.
 In order to install the plugin, run: 
 
 ```sh
-bin/plugin install elasticsearch/elasticsearch-cloud-aws/2.4.2
+bin/plugin install elasticsearch/elasticsearch-cloud-aws/2.5.1
 ```
 
 You need to install a version matching your Elasticsearch version:
@@ -16,7 +16,7 @@ You need to install a version matching your Elasticsearch version:
 |------------------------|-------------------|------------------------------------------------------------------------------------------------------------------------------------|
 | master | Build from source | See below |
 | es-1.x | Build from source | [2.6.0-SNAPSHOT](https://github.com/elasticsearch/elasticsearch-cloud-aws/tree/es-1.x/#version-260-snapshot-for-elasticsearch-1x) |
-| es-1.5 | 2.5.0 | [2.5.0](https://github.com/elastic/elasticsearch-cloud-aws/tree/v2.5.0/#version-250-for-elasticsearch-15) |
+| es-1.5 | 2.5.1 | [2.5.1](https://github.com/elastic/elasticsearch-cloud-aws/tree/v2.5.1/#version-251-for-elasticsearch-15) |
 | es-1.4 | 2.4.2 | [2.4.2](https://github.com/elasticsearch/elasticsearch-cloud-aws/tree/v2.4.2/#version-242-for-elasticsearch-14) |
 | es-1.3 | 2.3.0 | [2.3.0](https://github.com/elasticsearch/elasticsearch-cloud-aws/tree/v2.3.0/#version-230-for-elasticsearch-13) |
 | es-1.2 | 2.2.0 | [2.2.0](https://github.com/elasticsearch/elasticsearch-cloud-aws/tree/v2.2.0/#aws-cloud-plugin-for-elasticsearch) |