readme: fix old workflow badge

README.md

@@ -6,7 +6,7 @@ It uses the Arduino Core for ESP8266 framework and a number of 3rd party librari
 [![version](https://img.shields.io/badge/version-1.15.0--dev-brightgreen.svg)](CHANGELOG.md)
 [![branch](https://img.shields.io/badge/branch-dev-orange.svg)](https://github.com/xoseperez/espurna/tree/dev/)
 [![license](https://img.shields.io/github/license/xoseperez/espurna.svg)](LICENSE)
-[![ci build](https://github.com/xoseperez/espurna/workflows/ESPurna%20build/badge.svg?branch=dev)](https://github.com/xoseperez/espurna/actions)
+[![ci build](https://github.com/xoseperez/espurna/actions/workflows/push.yml/badge.svg?branch=dev)](https://github.com/xoseperez/espurna/actions/workflows/push.yml)
 <br />
 [![latest master build](https://img.shields.io/github/release/xoseperez/espurna/all.svg?label=latest%20master%20build)](https://github.com/xoseperez/espurna/releases/latest)
 [![latest dev build](https://img.shields.io/github/release/mcspr/espurna-nightly-builder/all.svg?label=latest%20dev%20build)](https://github.com/mcspr/espurna-nightly-builder/releases)