Update README.md

README.md

@@ -148,7 +148,6 @@ _Table of results of daily automated testing of cluster deployment:_
 | Debian 10    | [![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/vitabaks/postgresql_cluster/schedule_pg_debian10.yml?branch=master)](https://github.com/vitabaks/postgresql_cluster/actions/workflows/schedule_pg_debian10.yml) |
 | Debian 11    | [![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/vitabaks/postgresql_cluster/schedule_pg_debian11.yml?branch=master)](https://github.com/vitabaks/postgresql_cluster/actions/workflows/schedule_pg_debian11.yml) |
 | Debian 12    | [![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/vitabaks/postgresql_cluster/schedule_pg_debian11.yml?branch=master)](https://github.com/vitabaks/postgresql_cluster/actions/workflows/schedule_pg_debian12.yml) |
-| Ubuntu 18.04 | [![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/vitabaks/postgresql_cluster/schedule_pg_ubuntu1804.yml?branch=master)](https://github.com/vitabaks/postgresql_cluster/actions/workflows/schedule_pg_ubuntu1804.yml) |
 | Ubuntu 20.04 | [![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/vitabaks/postgresql_cluster/schedule_pg_ubuntu2004.yml?branch=master)](https://github.com/vitabaks/postgresql_cluster/actions/workflows/schedule_pg_ubuntu2004.yml) |
 | Ubuntu 22.04 | [![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/vitabaks/postgresql_cluster/schedule_pg_ubuntu2204.yml?branch=master)](https://github.com/vitabaks/postgresql_cluster/actions/workflows/schedule_pg_ubuntu2204.yml) |
 | CentOS Stream 8 | [![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/vitabaks/postgresql_cluster/schedule_pg_centosstream8.yml?branch=master)](https://github.com/vitabaks/postgresql_cluster/actions/workflows/schedule_pg_centosstream8.yml) |