Update to v8.12.1

Author: docker-elk-updater[bot]

.env

@@ -1,4 +1,4 @@
-ELASTIC_VERSION=8.11.4
+ELASTIC_VERSION=8.12.1
 
 ## Passwords for stack users
 #

README.md

@@ -1,6 +1,6 @@
 # Elastic stack (ELK) on Docker
 
-[![Elastic Stack version](https://img.shields.io/badge/Elastic%20Stack-8.11.4-00bfb3?style=flat&logo=elastic-stack)](https://www.elastic.co/blog/category/releases)
+[![Elastic Stack version](https://img.shields.io/badge/Elastic%20Stack-8.12.1-00bfb3?style=flat&logo=elastic-stack)](https://www.elastic.co/blog/category/releases)
 [![Build Status](https://github.com/deviantony/docker-elk/workflows/CI/badge.svg?branch=main)](https://github.com/deviantony/docker-elk/actions?query=workflow%3ACI+branch%3Amain)
 [![Join the chat](https://badges.gitter.im/Join%20Chat.svg)](https://app.gitter.im/#/room/#deviantony_docker-elk:gitter.im)