chore: clarify auto layout

README.md

@@ -22,7 +22,7 @@ This card is intended to display connections between entities with numeric state
 | type              | string  |                     | `custom:sankey-chart`
 | autoconfig        | object  |                     | Experimental. See [autoconfig](#autoconfig)
 | sections          | list    |                     | Required unless using autoconfig. Entities to show divided by sections, see [sections object](#sections-object) for additional options.
-| layout            | string  | auto                | Valid options are: 'horizontal' - flow left to right, 'vertical' - flow top to bottom & 'auto' - determine based on available space
+| layout            | string  | auto                | Valid options are: 'horizontal' - flow left to right, 'vertical' - flow top to bottom & 'auto' - determine based on available space (based on the section->`min_witdh` option, which defaults to 150)
 | energy_date_selection | boolean | false           | Integrate with the Energy Dashboard. Filters data based on the [energy-date-selection](https://www.home-assistant.io/dashboards/energy/) card. Use this only for accumulated data sensors (energy/water/gas) and with a `type:energy-date-selection` card. You still need to specify all your entities as HA doesn't know exactly how to connect them but you can use the general kWh entities that you have in the energy dashboard. In the future we may use areas to auto configure the chart.
 | title             | string  |                     | Optional header title for the card
 | unit_prefix       | string  |                     | Metric prefix for the unit of measurment. See <https://en.wikipedia.org/wiki/Unit_prefix> . Supported values are m, k, M, G, T