Update CONTRIBUTING.md

Author: marc0der

CONTRIBUTING.md

@@ -2,17 +2,14 @@
 
 We greatly value the feedback and contributions of our users.
 
-We keep a distinction between Bugs/Issues, New Features and Support Requests. We also try to minimise the noise in our GitHub Issues stream and prefer having a conversation on [SDKMAN Slack](https://slack.sdkman.io) before creating new issues, if you are not fully sure how to categorize your request. Simply sign up and join one of the following channels:
-
-- User Issues can be raised in our [User Issues channel](https://sdkman.slack.com/app_redirect?channel=user-issues).
-- New Features or Enhancements can be discussed in our [CLI Development channel](https://sdkman.slack.com/app_redirect?channel=cli-development).
+We distinguish between Bugs/Issues, New Features and Support Requests. We also try to minimise the noise in our GitHub Issues stream and prefer having a conversation on [SDKMAN Discord](https://discord.gg/y9mVJYVyu4) before creating new issues if you are not entirely sure how to categorize your request. Sign up and join our Help channel.
 
 The [GitHub Issue Tracker](https://github.com/sdkman/sdkman-cli/issues/new) provides templates for required information.
 
-**Unfortunately we might simply close any GitHub Issues that have not followed the requested template.**
+**Unfortunately, we might close any GitHub Issues that have not followed the requested template.**
 
 ### Pull Requests
 
-Pull Requests are _always_ very welcome, but require a valid GitHub Issue as described above. The PR template is to be filled in before submission, ensuring that it is _linked back_ to the GitHub Issue number by replacing `#XXX` with the appropriate issue reference.
+Pull Requests are _always_ very welcome but require a valid GitHub Issue as described above. The PR template is to be filled in before submission, ensuring that it is _linked back_ to the GitHub Issue number by replacing `#XXX` with the appropriate issue reference.
 
 Each PR should also be accompanied by a passing test(s) proving its validity (where feasible). The feasibility of the test will emerge in the initial discussions of the issue.