website: Update "Getting Help" section

This section now included expanded information on Reporting bugs and
Requesting Features.

Change-Id: I555f9f5edb683a1ee235058045fbce07ea473138

README.md

@@ -52,9 +52,28 @@ obtained from <https://resources.gem5.org>.
 More information on gem5 Resources can be found at
 <https://www.gem5.org/documentation/general_docs/gem5_resources/>.
 
-## Getting Help
-
-If you have questions, please send mail to gem5-users@gem5.org.
+## Getting Help, Reporting bugs, and Requesting Features
+
+We provide a variety of channels for users and developers to get help, report
+bugs, requests features, or engage in community discussions. Below
+are a few of the most common we recommend using.
+
+* **gem5-users@gem5.org**: A mailing list for users of gem5 to ask questions
+or start discussions. To join the mailing list please visit
+<https://www.gem5.org/mailing_lists>.
+* **gem5-dev@gem5.org**: A mailing list for developers of gem5 to ask questions
+or start discussions. To join the mailing list please visit
+<https://www.gem5.org/mailing_lists>.
+* **GitHub Discussions**: A GitHub Discussions page. This can be used to start
+discussions or ask questions. Available at
+<https://github.com/orgs/gem5/discussions>.
+* **GitHub Issues**: A GitHub Issues page for reporting bugs or requesting
+features. Available at <https://github.com/gem5/gem5/issues>.
+* **Jira Issue Tracker**: A Jira Issue Tracker for reporting bugs or requesting
+features. Available at <https://gem5.atlassian.net/>.
+* **Slack**: A Slack server with a variety of channels for the gem5 community
+to engage in a variety of discussions. Please visit
+<https://www.gem5.org/join-slack> to join.
 
 ## Contributing to gem5