Implement zen's rephrasing proposal

Slightly edited to add Oxford comma.

refs: #17851

config/gitlab-triage/templates/stalled.yml

@@ -35,10 +35,11 @@ resource_rules:
                 Then, if the issue is relevant for a Tails team, bring it to
                 their attention; else, forget it and take care of yourself :)
 
+
               - If you think you can realistically come back to it and finish
                 the work in the next months, say so on the issue, for example
-                by replacing the "Doing" label with "To Do" and setting
-                a suitable milestone.
+                by commenting about your planned time frame, replacing the
+                "Doing" label with "To Do", and setting a suitable milestone.
 
                 This will communicate your plans to the rest of the project and
                 ensure the task pops up on your radar at a suitable time.