chore(sample): upgrade cdk version

Author: krokoko

samples/mcp-stateless-lambda/README.md

@@ -49,7 +49,7 @@ Default output format [None]: json
 ```
 
 - Node.js: v18.12.1
-- [AWS CDK](https://github.com/aws/aws-cdk/releases/tag/v2.114.0): 2.114.0
+- [AWS CDK](https://github.com/aws/aws-cdk/releases/tag/v2.189.1): 2.189.1
 - jq: jq-1.6
 
 ### Deploy the solution

samples/mcp-stateless-lambda/package-lock.json

@@ -20,7 +20,7 @@
     "typescript": "~5.6.3"
   },
   "dependencies": {
-    "aws-cdk-lib": "2.185.0",
+    "aws-cdk-lib": "2.189.1",
     "constructs": "^10.0.0"
   }
 }