Update plugin.json's description to include the correct description

Author: icarthick

plugins/migration-to-aws/.claude-plugin/plugin.json

@@ -2,7 +2,7 @@
   "author": {
     "name": "Amazon Web Services"
   },
-  "description": "Migrate workloads from Google Cloud Platform to AWS with a 5-phase guided process: Terraform infrastructure discovery, requirements clarification, AWS architecture design, cost estimation, and execution planning.",
+  "description": "Migrate workloads from Google Cloud Platform to AWS with a 5-phase guided process: Terraform infrastructure discovery, requirements clarification, AWS architecture design, cost estimation, and execution planning. This no-cost tool assesses your current cloud provider's usage, geography, and billing data to estimate and compare AWS services and pricing, and recommends migration or continued use of your current provider. AWS pricing is based on current published pricing and may vary over time. The tool may generate a .migration folder containing comparison and migration execution data, which you may delete upon completion or use to migrate to AWS.",
   "homepage": "https://github.com/awslabs/agent-plugins",
   "keywords": [
     "aws",