message: Update apis/console/src/lib.rs
  Describe when upcalls happen with more precision
diff: @@ -95,7 +95,7 @@ impl<
  S::subscribe::<_, _, C, DRIVER_NUM, { subscribe::READ }>(subscribe, &called)?;
  // When this fails, `called` is guaranteed unmodified,
  - // because upcalls are never processed within a `command` call.
  + // because upcalls are never processed until we call `yield`.
  S::command(DRIVER_NUM, command::READ, len as u32, 0).to_result()?;
  loop {
  