message: Update src/cargo/ops/registry.rs with err msg
diff: @@ -98,7 +98,7 @@ pub fn publish(ws: &Workspace<'_>, opts: &PublishOpts<'_>) -> CargoResult<()> {
  }
  } else {
  if ws.is_virtual() {
  - bail!("must use `-p` argument in virtual manifest")
  + bail!("the `-p` argument must be specified in the root of a virtual workspace")
  }
  }
  let member_ids = ws.members().map(|p| p.package_id());
  