Fix package homepage

Author: jspahrsummers

package.json

@@ -4,7 +4,7 @@
   "description": "Model Context Protocol implementation for TypeScript",
   "license": "MIT",
   "author": "Anthropic, PBC (https://anthropic.com)",
-  "homepage": "https://modelcontextprotocol.github.io",
+  "homepage": "https://modelcontextprotocol.io",
   "bugs": "https://github.com/modelcontextprotocol/typescript-sdk/issues",
   "type": "module",
   "main": "./dist/index.js",