[Documentation:Developer] Add LiveChat to the forum module (#687)

With the addition of the new feature Live Chat, we should allow Live
Chat as a title module so that new PRs relating to it are better
organized. See action-pr-title PR here:
[https://github.com/Submitty/action-pr-title/pull/13](url)

Author: martig7

_docs/developer/getting_started/make_a_pull_request.md

@@ -68,7 +68,7 @@ Be sure to read the [Suggestions for New Developers](/developer/getting_started/
 
       * `Submission` (includes bulk uploads, teams, late days, notebook gradeables, and other student features),
       * `Autograding` (includes router, container/docker),
-      * `Forum`,   
+      * `Forum` (Includes Live Chat),  
       * `Notifications` (includes email and grade inquiries),  
       * `TAGrading` (includes PDF annotation, peer grading),  
       * `InstructorUI` (includes course and gradeable configuration),