Update Readme for AWS region (#613)

Signed-off-by: Roshan Patil <patilroshan443@gmail.com>

Signed-off-by: Roshan Patil <patilroshan443@gmail.com>

Author: rosspatil

README.md

@@ -1,4 +1,5 @@
 # Elasticsearch Exporter
+
 [![CircleCI](https://circleci.com/gh/prometheus-community/elasticsearch_exporter.svg?style=svg)](https://circleci.com/gh/prometheus-community/elasticsearch_exporter)
 [![Go Report Card](https://goreportcard.com/badge/github.com/prometheus-community/elasticsearch_exporter)](https://goreportcard.com/report/github.com/prometheus-community/elasticsearch_exporter)
 
@@ -7,7 +8,7 @@ Prometheus exporter for various metrics about Elasticsearch, written in Go.
 ### Installation
 
 For pre-built binaries please take a look at the releases.
-https://github.com/prometheus-community/elasticsearch_exporter/releases
+<https://github.com/prometheus-community/elasticsearch_exporter/releases>
 
 #### Docker
 
@@ -30,7 +31,7 @@ elasticsearch_exporter:
 
 #### Kubernetes
 
-You can find a helm chart in the prometheus-community charts repository at https://github.com/prometheus-community/helm-charts/tree/main/charts/prometheus-elasticsearch-exporter
+You can find a helm chart in the prometheus-community charts repository at <https://github.com/prometheus-community/helm-charts/tree/main/charts/prometheus-elasticsearch-exporter>
 
 ```bash
 helm repo add prometheus-community https://prometheus-community.github.io/helm-charts
@@ -42,13 +43,14 @@ helm install [RELEASE_NAME] prometheus-community/prometheus-elasticsearch-export
 **NOTE:** The exporter fetches information from an Elasticsearch cluster on every scrape, therefore having a too short scrape interval can impose load on ES master nodes, particularly if you run with `--es.all` and `--es.indices`. We suggest you measure how long fetching `/_nodes/stats` and `/_all/_stats` takes for your ES cluster to determine whether your scraping interval is too short. As a last resort, you can scrape this exporter using a dedicated job with its own scraping interval.
 
 Below is the command line options summary:
+
 ```bash
 elasticsearch_exporter --help
 ```
 
 | Argument                | Introduced in Version | Description | Default     |
 | --------                | --------------------- | ----------- | ----------- |
-| es.uri                  | 1.0.2                 | Address (host and port) of the Elasticsearch node we should connect to. This could be a local node (`localhost:9200`, for instance), or the address of a remote Elasticsearch server. When basic auth is needed, specify as: `<proto>://<user>:<password>@<host>:<port>`. E.G., `http://admin:pass@localhost:9200`. Special characters in the user credentials need to be URL-encoded. | http://localhost:9200 |
+| es.uri                  | 1.0.2                 | Address (host and port) of the Elasticsearch node we should connect to. This could be a local node (`localhost:9200`, for instance), or the address of a remote Elasticsearch server. When basic auth is needed, specify as: `<proto>://<user>:<password>@<host>:<port>`. E.G., `http://admin:pass@localhost:9200`. Special characters in the user credentials need to be URL-encoded. | <http://localhost:9200> |
 | es.all                  | 1.0.2                 | If true, query stats for all nodes in the cluster, rather than just the node we connect to.                             | false |
 | es.cluster_settings     | 1.1.0rc1              | If true, query stats for cluster settings. | false |
 | es.indices              | 1.0.2                 | If true, query stats for all indices in the cluster. | false |
@@ -67,6 +69,7 @@ elasticsearch_exporter --help
 | es.ssl-skip-verify      | 1.0.4rc1              | Skip SSL verification when connecting to Elasticsearch. | false |
 | web.listen-address      | 1.0.2                 | Address to listen on for web interface and telemetry. | :9114 |
 | web.telemetry-path      | 1.0.2                 | Path under which to expose metrics. | /metrics |
+| aws.region              | 1.5.0                 | Region for AWS elasticsearch | |
 | version                 | 1.0.2                 | Show version info on stdout and exit. | |
 
 Commandline parameters start with a single `-` for versions less than `1.1.0rc1`.
@@ -93,6 +96,7 @@ es.slm | `read_slm`
 es.data_stream | `monitor` or `manage` (per index or `*`) |
 
 Further Information
+
 - [Build in Users](https://www.elastic.co/guide/en/elastic-stack-overview/7.3/built-in-users.html)
 - [Defining Roles](https://www.elastic.co/guide/en/elastic-stack-overview/7.3/defining-roles.html)
 - [Privileges](https://www.elastic.co/guide/en/elastic-stack-overview/7.3/security-privileges.html)
@@ -248,7 +252,6 @@ Further Information
 | elasticsearch_data_stream_backing_indices_total                       | gauge     | 1           | Number of backing indices for Data Stream
 | elasticsearch_data_stream_store_size_bytes                            | gauge     | 1           | Current size of data stream backing indices in bytes
 
-
 ### Alerts & Recording Rules
 
 We provide examples for [Prometheus](http://prometheus.io) [alerts and recording rules](examples/prometheus/elasticsearch.rules) as well as an [Grafana](http://www.grafana.org) [Dashboard](examples/grafana/dashboard.json) and a [Kubernetes](http://kubernetes.io) [Deployment](examples/kubernetes/deployment.yml).
@@ -281,7 +284,7 @@ who transferred this repository to us in January 2017.
 
 Maintainers of this repository:
 
-* Christoph Oelmüller <christoph.oelmueller@justwatch.com> @zwopir
+- Christoph Oelmüller <christoph.oelmueller@justwatch.com> @zwopir
 
 Please refer to the Git commit log for a complete list of contributors.