Untitled undefined type in Mermaid Config Schema

https://mermaid.js.org/schemas/config.schema.json#/$defs/SequenceDiagramConfig/properties/messageFontSize

This sets the font size of actor messages

Abstract	Extensible	Status	Identifiable	Custom Properties	Additional Properties	Access Restrictions	Defined In
Can be instantiated	No	Unknown status	Unknown identifiability	Forbidden	Allowed	none	config.schema.json*

messageFontSize Type

any of the following: string or number (Details)

messageFontSize Default Value

The default value is:

16