Fixes nightly build badge (#3158)

Author: McGiverGim

README.md

@@ -2,7 +2,7 @@
 
 ![Betaflight](http://static.rcgroups.net/forums/attachments/6/1/0/3/7/6/a9088900-228-bf_logo.jpg)
 
-[![Latest version](https://img.shields.io/github/v/release/betaflight/betaflight-configurator)](https://github.com/betaflight/betaflight-configurator/releases) [![Build](https://img.shields.io/github/workflow/status/betaflight/betaflight-configurator/Nightly)](https://github.com/betaflight/betaflight-configurator/actions/workflows/nightly.yml) [![Crowdin](https://d322cqt584bo4o.cloudfront.net/betaflight-configurator/localized.svg)](https://crowdin.com/project/betaflight-configurator) [![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=betaflight_betaflight-configurator&metric=alert_status)](https://sonarcloud.io/dashboard?id=betaflight_betaflight-configurator) [![License: GPL v3](https://img.shields.io/badge/License-GPLv3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0)
+[![Latest version](https://img.shields.io/github/v/release/betaflight/betaflight-configurator)](https://github.com/betaflight/betaflight-configurator/releases) [![Build](https://img.shields.io/github/actions/workflow/status/betaflight/betaflight-configurator/nightly.yml?branch=master)](https://github.com/betaflight/betaflight-configurator/actions/workflows/nightly.yml) [![Crowdin](https://d322cqt584bo4o.cloudfront.net/betaflight-configurator/localized.svg)](https://crowdin.com/project/betaflight-configurator) [![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=betaflight_betaflight-configurator&metric=alert_status)](https://sonarcloud.io/dashboard?id=betaflight_betaflight-configurator) [![License: GPL v3](https://img.shields.io/badge/License-GPLv3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0)
 
 
 Betaflight Configurator is a crossplatform configuration tool for the Betaflight flight control system.