fix: update oas3.2 types

Author: vadyvas

packages/core/src/types/oas3_2.ts

@@ -191,15 +191,12 @@ const Discriminator: NodeType = {
 };
 
 const Example: NodeType = {
+  ...Oas3_1Types.Example,
   properties: {
-    value: { resolvable: false },
-    summary: { type: 'string' },
-    description: { type: 'string' },
-    externalValue: { type: 'string' },
+    ...Oas3_1Types.Example.properties,
     dataValue: { resolvable: false },
     serializedValue: { type: 'string' },
   },
-  extensionsPrefix: 'x-',
 };
 
 export const Oas3_2Types = {
@@ -216,5 +213,4 @@ export const Oas3_2Types = {
   MediaType,
   Discriminator,
   Example,
-  ExamplesMap: mapOf('Example'),
 } as const;