Fix missing alternative schemas (#3058)

Author: nolannbiron

.changeset/chilled-eggs-attack.md

@@ -0,0 +1,5 @@
+---
+'@gitbook/react-openapi': patch
+---
+
+Fix missing alternative schemas

packages/react-openapi/src/OpenAPISchema.tsx

@@ -50,7 +50,7 @@ function OpenAPISchemaProperty(props: {
                 circularRefs.set(schema, id);
 
                 const properties = getSchemaProperties(schema);
-                if (properties) {
+                if (properties?.length) {
                     return (
                         <OpenAPIDisclosure context={context} label={getDisclosureLabel(schema)}>
                             <OpenAPISchemaProperties