fix: shorten description to pass MCP registry 100-char limit

Author: BuyWhere

server.json

@@ -2,7 +2,7 @@
   "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
   "name": "io.github.BuyWhere/buywhere-mcp",
   "title": "BuyWhere MCP",
-  "description": "BuyWhere MCP server — cross-border product search and price comparison for AI agents. Singapore, SEA, US markets.",
+  "description": "BuyWhere MCP \u2014 cross-border product search and price comparison API for AI agents. Singapore, SEA, US.",
   "repository": {
     "url": "https://github.com/BuyWhere/buywhere-mcp",
     "source": "github"