How to force the subgraph name to be a single line and add a bottom margin to it ?

[solveretur]

Hi, I have a mermaidjs graph that I define like

---
title: Cleanup graph
---
flowchart BT
  926 --> 1964
  1964 --> 2154
  2154 --> 2305
  subgraph a282d6da-0b2c-4584-99c0-a77bc67ff705 [a282d6da-0b2c-4584-99c0-a77bc67ff705]
    direction BT
    926(We use these movements to create a stockpile from

subtype: 17
quantity: 1)
    1964(Stockpile matches condition so that we consider it already cleaned

subtype: 17
quantity: 1)
    2154(Stockpile matches condition as a trustworthy stockpile that need Cr2 cleanup

subtype: 17
quantity: 1)
    2305(Stockpile was a post sale as eventDate was: 2024-06-20  / cr2Date was : 2024-06-26 / campaignStartDate was : 2024-06-03

subtype: 17
quantity: 1)
  end

Currently it looks like this

As you see the subgraph's title is wrapped onto multiple lines and the margin between it and the nodes is so small that you can't really read it. I'd like to ask you how to force the subgraph's title onto one line (I am ok with the subgraph's box to get wider) and to add some gap between it and the nodes ?