fix(xml): example generation if an array has an example (#6634)

ref: #6627

test/e2e-cypress/static/documents/bugs/6627.yaml

@@ -0,0 +1,41 @@
+openapi: 3.0.1
+info:
+  title: XML array schema with array-level example
+  version: 1.0.0
+
+paths:
+  /users:
+    get:
+      responses:
+        "200":
+          description: ''
+          content:
+            application/xml:
+              schema:
+                $ref: '#/components/schemas/Users'
+
+components:
+  schemas:
+    Users:
+      type: array
+      example:
+        - id: 123
+          name: bob
+        - id: 456
+          name: jane
+      xml:
+        name: Users
+        wrapped: true
+      items:
+        type: object
+        xml:
+          name: User
+        properties:
+          id:
+            type: integer
+            xml:
+              attribute: true
+          name:
+            type: string
+            xml:
+              attribute: true