Link directly to #react-router on Reactiflux (#7724)

.github/ISSUE_TEMPLATE/Bug_report.md

@@ -14,7 +14,7 @@ The issue tracker is meant for bug reports only. This isn't the best place for u
 - Check out the list of frequently asked questions: https://github.com/ReactTraining/react-router/blob/master/FAQ.md
 - Explore examples: https://reacttraining.com/react-router/web/example/basic
 - Look for/ask questions on Stack Overflow: https://stackoverflow.com/questions/ask?tags=react-router
-- Ask in chat: https://discord.gg/0ZcbPKXt5bYaNQ46
+- Ask in chat: https://discord.gg/6RyV8n8yyM
 
 Think you found a bug?
 ======================

.github/ISSUE_TEMPLATE/Custom.md

@@ -6,4 +6,4 @@ about: For usage questions, please use Stack Overflow or Reactiflux!
 This is a bug tracker, not a support system. For usage questions, please use Stack Overflow or Reactiflux where there are a lot more people ready to help you out. Thanks!
 
 https://stackoverflow.com/questions/tagged/react-router  
-https://www.reactiflux.com/
+https://discord.gg/6RyV8n8yyM

.github/support.yml

@@ -9,7 +9,7 @@ supportComment: >
   :wave: @{issue-author}, we use the issue tracker exclusively for bug reports
   and feature requests. However, this issue appears to be a support request.
   For usage questions, please use [Stack Overflow](https://stackoverflow.com/questions/tagged/react-router)
-  or [Reactiflux](https://www.reactiflux.com/) where there are a lot more people ready to help you out.
+  or [Reactiflux](https://discord.gg/6RyV8n8yyM) where there are a lot more people ready to help you out.
 
   Please feel free to clarify your issue if you think it was closed prematurely.