doc: clarify assigning issues to the TSC

PR-URL: #22759
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>

Author: fhinkel

COLLABORATOR_GUIDE.md

@@ -486,16 +486,20 @@ level.
 
 ### Involving the TSC
 
-Collaborators may opt to elevate pull requests or issues to the [TSC][] for
-discussion by assigning the `tsc-review` label or @-mentioning the
-`@nodejs/tsc` GitHub team. This should be done where a pull request:
+Collaborators may opt to elevate pull requests or issues to the [TSC][].
+This should be done where a pull request:
 
 - is labeled `semver-major`, or
 - has a significant impact on the codebase, or
 - is inherently controversial, or
 - has failed to reach consensus amongst the Collaborators who are
   actively participating in the discussion.
 
+Assign the `tsc-review` label or @-mention the
+`@nodejs/tsc` GitHub team if you want to elevate an issue to the [TSC][].
+Do not use the GitHub UI on the right hand side to assign to
+`@nodejs/tsc` or request a review from `@nodejs/tsc`.
+
 The TSC should serve as the final arbiter where required.
 
 ## Landing Pull Requests