Allow boolean values for top level schemaObjects

Signed-off-by: Mike Ralphson <mike.ralphson@gmail.com>

versions/3.1.1.md

@@ -2306,7 +2306,7 @@ $ref: definitions.yaml#/Pet
 #### <a name="schemaObject"></a>Schema Object
 
 The Schema Object allows the definition of input and output data types.
-These types can be objects, but also primitives and arrays. This object is a superset of the [JSON Schema Specification Draft 2020-12](https://tools.ietf.org/html/draft-bhutton-json-schema-00).
+These types can be objects, but also primitives and arrays. This object is a superset of the [JSON Schema Specification Draft 2020-12](https://tools.ietf.org/html/draft-bhutton-json-schema-00). The empty schema (which allows any instance to validate) MAY be represented by the `boolean` value `true` and a schema which allows no instance to validate MAY be represented by the `boolean` value `false`.
 
 For more information about the properties, see [JSON Schema Core](https://tools.ietf.org/html/draft-bhutton-json-schema-00) and [JSON Schema Validation](https://tools.ietf.org/html/draft-bhutton-json-schema-validation-00).