add cd status on README

README.md

@@ -3,6 +3,7 @@
 A classic implementation of the Pong game developed specifically for the Arduino UNO R4 WiFi, utilizing its built-in 12×8 LED matrix as the game screen.
 
 [![Arduino Pong CI](https://github.com/Dea1993/arduino_pong/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/Dea1993/arduino_pong/actions/workflows/ci.yml)
+[![Arduino Pong CD](https://github.com/Dea1993/arduino_pong/actions/workflows/cd.yml/badge.svg)](https://github.com/Dea1993/arduino_pong/actions/workflows/cd.yml)
 [![License: GPL v3](https://img.shields.io/badge/License-GPLv3-blue.svg)](LICENSE)
 
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