message: link to proposals page so that the main steering-meeting page has "everything" in one place.
  (The motivation for this is to provide a usable target page for other pages
  outside forge, such as the compiler-team site, that want to explain the steering
  meeting.)
diff: @@ -24,6 +24,11 @@ topic, if that topic is complex. **Week 4 is reserved for
  non-technical topics**, so as to ensure that we are keeping an eye on
  the overall health and functioning of the team.
  +### Where do proposals come from?
  +
  +The team accepts proposals via an open submission process,
  +which is documented on [its own page](steering-meeting/submit.md)
  +
  ## Announcing the schedule
  After each planning meeting, the topics for the next three weeks are
  