chore: upgrade aws-cdk to 2.187.0 in custom resource migration tests (#14171)

Author: Amplifiyer

packages/amplify-migration-tests/custom-resources/custom-cdk-stack-vLatest.package.json

@@ -9,7 +9,7 @@
   },
   "dependencies": {
     "@aws-amplify/cli-extensibility-helper": "^3.0.0",
-    "aws-cdk-lib": "~2.184.0",
+    "aws-cdk-lib": "~2.187.0",
     "constructs": "^10.0.5"
   },
   "devDependencies": {