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

ref: #6627

test/e2e-cypress/tests/bugs/6627.js

@@ -0,0 +1,11 @@
+describe("#6627: XML example when defined as array", () => {
+  it("should render xml like json", () => {
+    const expected = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<Users>\n\t<User id=\"123\" name=\"bob\">\n\t</User>\n\t<User id=\"456\" name=\"jane\">\n\t</User>\n</Users>"
+    cy
+      .visit("/?url=/documents/bugs/6627.yaml")
+      .get("#operations-default-get_users")
+      .click()
+      .get(".microlight")
+      .contains(expected)
+  })
+})