switch appium-discuss links from google-groups to discourse

README.md

@@ -135,7 +135,7 @@ for instructions on how to build, test and run Appium from source.
 
 ### Mailing List
 
-Announcements and debates often take place on the [Discussion Group](https://groups.google.com/d/forum/appium-discuss), be sure to sign up!
+Announcements and debates often take place on the [Discussion Group](https://discuss.appium.io), be sure to sign up!
 
 ### Troubleshooting
 

docs/en/appium-setup/troubleshooting.md

@@ -1,7 +1,7 @@
 ## Troubleshooting Appium
 
 Here's what to do if you're experiencing problems, before you submit a ticket
-to github or write to the [appium-discuss mailing list](https://groups.google.com/forum/#!forum/appium-discuss).
+to github or write to the [appium-discuss discussion group](https://discuss.appium.io).
 
 ### General
 
@@ -88,7 +88,7 @@ Once you've tried the above steps and your issue still isn't resolved,
 here's what you can do:
 
 If you're having trouble getting Appium working and the error messages Appium
-provides are not clear, join the [mailing list](https://groups.google.com/d/forum/appium-discuss)
+provides are not clear, join the [discussion group](https://discuss.appium.io)
 and send a message. Please include the following:
 
 * How you're running Appium (Appium.app, npm, source)