added build action badge

Author: rdefeo

README.md

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 ## Quick Action Remote Control for Flipperzero
 
+[Latest Version: 0.6](https://github.com/rdefeo/quac/releases)
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+![build status badge](https://github.com/rdefeo/quac/actions/workflows/build.yml/badge.svg)
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 This app allows you to organize previously recorded signals, of any type*, so that you can quickly and easily play them back. No more needing to recall whether that door is Sub-GHz or RFID! Just navigate to that action in **Quac!** and press OK to send!
 
 The app does not provide any recording functionality - you must use the existing Flipperzero apps to create the saved files for your action/device. Quac! provides some basic functionality to manage your files. Or, you can manage the folder structure manually on your SD card.