Improve test plan instructions for moderated sessions (#37167)

* Improve test plan instructions for moderated sessions

* Update testplan.md

.github/ISSUE_TEMPLATE/testplan.md

@@ -824,12 +824,14 @@ $ TELEPORT_TEST_GCP_KMS_KEYRING=projects/<account>/locations/us-west3/keyRings/<
 
 ## Moderated session
 
-Using `tsh` join an SSH session as two moderators (two separate terminals, role requires one moderator).
- - [ ] `Ctrl+C` in the #1 terminal should disconnect the moderator.
- - [ ] `Ctrl+C` in the #2 terminal should disconnect the moderator and terminate the session as session has no moderator.
+Create two Teleport users, a moderator and a user. Configure Teleport roles to require that the moderator moderate the user's sessions. Use `TELEPORT_HOME` to `tsh login` as the user in one terminal, and the moderator in another.
 
-Using `tsh` join an SSH session as two moderators (two separate terminals, role requires one moderator).
-- [ ] `t` in any terminal should terminate the session for all participants.
+Ensure the default `terminationPolicy` of `terminate` has not been changed.
+
+For each of the following cases, create a moderated session with the user using `tsh ssh` and join this session with the moderator using `tsh join --role moderator`:
+ - [ ] Ensure that `Ctrl+C` in the user terminal disconnects the moderator as the session has ended.
+ - [ ] Ensure that `Ctrl+C` in the moderator terminal disconnects the moderator and terminates the user's session as the session no longer has a moderator.
+ - [ ] Ensure that `t` in the moderator terminal terminates the session for all participants.
 
 ## Performance