Update README.md

Author: 1ucian0

README.md

@@ -1,8 +1,12 @@
+> [!WARNING]  
+> **PROJECT NO LONGER MAINTAINED**  
+> Qiskit Metal is no longer actively maintained or supported.
+
 # Qiskit Metal 
 [![License](https://img.shields.io/github/license/Qiskit/qiskit-metal.svg?style=popout-square)](https://opensource.org/licenses/Apache-2.0)<!--- long-description-skip-begin -->[![Release](https://img.shields.io/github/release/Qiskit/qiskit-metal.svg?style=popout-square)](https://github.com/Qiskit/qiskit-metal/releases)<!--- long-description-skip-begin -->[![join slack](https://img.shields.io/badge/[email protected]?logo=slack&style=popout-square)](https://qisk.it/join-slack)[![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.4618153.svg)](https://doi.org/10.5281/zenodo.4618153)
 
->![Welcome to Qiskit Metal!](https://raw.githubusercontent.com/Qiskit/qiskit-metal/main/docs/images/zkm_banner.png 'Welcome to Qiskit Metal')
-> Qiskit Metal is an open-source framework for engineers and scientists to design superconducting quantum devices with ease.
+![Welcome to Qiskit Metal!](https://raw.githubusercontent.com/Qiskit/qiskit-metal/main/docs/images/zkm_banner.png 'Welcome to Qiskit Metal')
+ Qiskit Metal is an open-source framework for engineers and scientists to design superconducting quantum devices with ease.
 
 
 ## Major Update: Upcoming Qiskit Metal Release 🚀