Updated README.md build badge and removed non-working Codacy badge. (#524)

* Updated README.md build badge to use GitHub Actions.

Signed-off-by: RICCIARDI-Adrien <[email protected]>

* Removed Codacy badge from README.md as it does not work anymore.

Signed-off-by: RICCIARDI-Adrien <[email protected]>

Author: RICCIARDI-Adrien

README.md

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-# linuxdeployqt [![Build Status](https://travis-ci.org/probonopd/linuxdeployqt.svg?branch=master)](https://travis-ci.org/probonopd/linuxdeployqt) ![Downloads](https://img.shields.io/github/downloads/probonopd/linuxdeployqt/total.svg) [![Codacy Badge](https://api.codacy.com/project/badge/Grade/93b4a359057e412b8a7673b4b61d7cb7)](https://www.codacy.com/app/probonopd/linuxdeployqt?utm_source=github.com&utm_medium=referral&utm_content=probonopd/linuxdeployqt&utm_campaign=Badge_Grade) [![discourse](https://img.shields.io/badge/forum-discourse-orange.svg)](http://discourse.appimage.org/t/linuxdeployqt-new-linux-deployment-tool-for-qt/57) [![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/probonopd/AppImageKit?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge) [![irc](https://img.shields.io/badge/IRC-%23AppImage%20on%20freenode-blue.svg)](https://webchat.freenode.net/?channels=AppImage)
+# linuxdeployqt [![Build Status](https://github.com/probonopd/linuxdeployqt/actions/workflows/build.yaml/badge.svg?branch=master)](https://github.com/probonopd/linuxdeployqt/actions) ![Downloads](https://img.shields.io/github/downloads/probonopd/linuxdeployqt/total.svg) [![discourse](https://img.shields.io/badge/forum-discourse-orange.svg)](http://discourse.appimage.org/t/linuxdeployqt-new-linux-deployment-tool-for-qt/57) [![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/probonopd/AppImageKit?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge) [![irc](https://img.shields.io/badge/IRC-%23AppImage%20on%20freenode-blue.svg)](https://webchat.freenode.net/?channels=AppImage)
 
 This Linux Deployment Tool, `linuxdeployqt`, takes an application as input and makes it self-contained by copying in the resources that the application uses (like libraries, graphics, and plugins) into a bundle. The resulting bundle can be distributed as an AppDir or as an [AppImage](https://appimage.org/) to users, or can be put into cross-distribution packages. It can be used as part of the build process to deploy applications written in C, C++, and other compiled languages with systems like `CMake`, `qmake`, and `make`. When used on Qt-based applications, it can bundle a specific minimal subset of Qt required to run the application.