update Readme

Author: Schmaetz

README.md

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 **The CYBERTEC PG Operator (CPO)** is a powerful Kubernetes operator that dramatically simplifies the creation and management of highly available **PostgreSQL clusters**. 
 Fully integrated with GitOps/CI/CD workflows and infrastructure-as-code principles, CPO enables consistent, secure and automated database provisioning - **without direct access to the Kubernetes API**.
 
-<div style="text-align: center;">
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   <img src="docs/diagrams/cpo_logo.svg" width="350" alt="CPO Logo">
 </div>