Docs: Update Gemini benchmark results

tests/8_json_validator/outputs_gemini/gemini-3-pro-preview TEMP_0.5.js

@@ -0,0 +1,7 @@
+const validateJSON = async (data, schema) => {
+  const Ajv = (await import('https://esm.sh/ajv@8.17.1')).default
+  const validate = new Ajv({ allErrors: true }).compile(schema)
+  const valid = validate(data)
+  return { valid, errors: validate.errors?.map(e => e.message) ?? [] }
+}
+export default validateJSON;