README: added link to Discord server

README.md

@@ -2,12 +2,17 @@
 
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-[![arduino-library-badge](https://www.ardu-badge.com/badge/ArduinoJson.svg?version=6.18.4)](https://www.ardu-badge.com/ArduinoJson/6.18.4)
-[![Continuous Integration](https://github.com/bblanchon/ArduinoJson/workflows/Continuous%20Integration/badge.svg?branch=6.x)](https://github.com/bblanchon/ArduinoJson/actions?query=workflow%3A%22Continuous+Integration%22+branch%3A6.x)
+[![GitHub Workflow Status](https://img.shields.io/github/workflow/status/bblanchon/ArduinoJson/Continuous%20Integration?logo=github)](https://github.com/bblanchon/ArduinoJson/actions?query=workflow%3A%22Continuous+Integration%22+branch%3A6.x)
 [![Continuous Integration](https://ci.appveyor.com/api/projects/status/m7s53wav1l0abssg/branch/6.x?svg=true)](https://ci.appveyor.com/project/bblanchon/arduinojson/branch/6.x)
 [![Fuzzing Status](https://oss-fuzz-build-logs.storage.googleapis.com/badges/arduinojson.svg)](https://bugs.chromium.org/p/oss-fuzz/issues/list?sort=-opened&can=1&q=proj:arduinojson)
 [![Coverage Status](https://coveralls.io/repos/github/bblanchon/ArduinoJson/badge.svg?branch=6.x)](https://coveralls.io/github/bblanchon/ArduinoJson?branch=6.x)
-[![GitHub stars](https://img.shields.io/github/stars/bblanchon/ArduinoJson?style=flat)](https://github.com/bblanchon/ArduinoJson/stargazers)
+
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+[![Discord](https://img.shields.io/discord/844900310409150494.svg?logo=discord&logoColor=white&color=007ec6)](https://discord.gg/DzN6hHHD4h)
+[![GitHub stars](https://img.shields.io/github/stars/bblanchon/ArduinoJson?style=flat&logo=github)](https://github.com/bblanchon/ArduinoJson/stargazers)
+[![GitHub Sponsors](https://img.shields.io/github/sponsors/bblanchon?logo=github)](https://github.com/sponsors/bblanchon)
+
+[![arduino-library-badge](https://www.ardu-badge.com/badge/ArduinoJson.svg?version=6.18.4)](https://www.ardu-badge.com/ArduinoJson/6.18.4)
 
 ArduinoJson is a C++ JSON library for Arduino and IoT (Internet Of Things).