chore: bump OpenSearch from 2.2.1 to 2.3.0

Signed-off-by: Yoan Blanc <[email protected]>

README.md

@@ -40,6 +40,7 @@ This plugin was started as a fork of [Prometheus exporter for Elasticsearch®](h
 
 | OpenSearch |      Plugin |   Release date |
 |-----------:|------------:|---------------:|
+|      2.3.0 |     2.3.0.0 |   Sep 15, 2022 |
 |      2.2.1 |     2.2.1.0 |   Sep  5, 2022 |
 |      2.2.0 |     2.2.0.0 |   Aug 13, 2022 |
 |      2.1.0 |     2.1.0.0 |  July 13, 2022 |
@@ -63,7 +64,7 @@ You need to install the plugin on every OpenSearch node that will be scraped by
 
 To **install** the plugin:
 
-`./bin/opensearch-plugin install https://github.com/aiven/prometheus-exporter-plugin-for-opensearch/releases/download/2.2.1.0/prometheus-exporter-2.2.1.0.zip`
+`./bin/opensearch-plugin install https://github.com/aiven/prometheus-exporter-plugin-for-opensearch/releases/download/2.3.0.0/prometheus-exporter-2.3.0.0.zip`
 
 To **remove** the plugin.
 

gradle.properties

@@ -1,6 +1,6 @@
 #group = org.opensearch.plugin.prometheus
 
-version = 2.2.1.0
+version = 2.3.0.0
 
 pluginName = prometheus-exporter
 pluginClassname = org.opensearch.plugin.prometheus.PrometheusExporterPlugin