Fixed discord links

CONTRIBUTING.md

@@ -28,7 +28,7 @@ You can use [GitHub issue tracker](https://github.com/thecodingmachine/workadven
 - File bug reports
 - Ask for feature requests
 
-If you have more general questions, a good place to ask is [our Discord server](https://discord.gg/YGtngdh9gt).
+If you have more general questions, a good place to ask is [our Discord server](https://discord.gg/G6Xh9ZM9aR).
 
 Finally, you can come and talk to the WorkAdventure core team... on WorkAdventure, of course! [Our offices are here](https://play.staging.workadventu.re/@/tcm/workadventure/wa-village).
 
@@ -41,7 +41,7 @@ Please ask first before embarking on any significant pull request (e.g. implemen
 otherwise you risk spending a lot of time working on something that the project's developers might not want to merge
 into the project.
 
-You can ask us on [Discord](https://discord.gg/YGtngdh9gt) or in the [GitHub issues](https://github.com/thecodingmachine/workadventure/issues).
+You can ask us on [Discord](https://discord.gg/G6Xh9ZM9aR) or in the [GitHub issues](https://github.com/thecodingmachine/workadventure/issues).
 
 ### Linting your code
 

README.md

@@ -1,4 +1,4 @@
-![](https://github.com/thecodingmachine/workadventure/workflows/Continuous%20Integration/badge.svg) [![Discord](https://img.shields.io/discord/821338762134290432?label=Discord)](https://discord.gg/YGtngdh9gt)
+![](https://github.com/thecodingmachine/workadventure/workflows/Continuous%20Integration/badge.svg) [![Discord](https://img.shields.io/discord/821338762134290432?label=Discord)](https://discord.gg/G6Xh9ZM9aR)
 
 ![WorkAdventure logo](README-LOGO.svg)
 ![WorkAdventure office image](README-MAP.png)