Release 1.3.15.0

Signed-off-by: Lukáš Vlček <lukas.vlcek@aiven.io>

README.md

@@ -40,6 +40,7 @@ This plugin was started as a fork of [Prometheus exporter for Elasticsearch®](h
 
 | OpenSearch |   Plugin | Release date |
 |-----------:|---------:|-------------:|
+|     1.3.15 | 1.3.15.0 | Apr 05, 2024 |
 |     1.3.14 | 1.3.14.0 | Dec 20, 2023 |
 |     1.3.13 | 1.3.13.0 | Sep 27, 2023 |
 |     1.3.12 | 1.3.12.0 | Aug 31, 2023 |
@@ -66,7 +67,7 @@ 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/1.3.14.0/prometheus-exporter-1.3.14.0.zip`
+`./bin/opensearch-plugin install https://github.com/aiven/prometheus-exporter-plugin-for-opensearch/releases/download/1.3.15.0/prometheus-exporter-1.3.15.0.zip`
 
 To **remove** the plugin.