fix url in package.json

Author: pcarleton

package.json

@@ -6,6 +6,7 @@
   "author": "Anthropic, PBC (https://anthropic.com)",
   "homepage": "https://modelcontextprotocol.io",
   "bugs": "https://github.com/modelcontextprotocol/conformance/issues",
+  "url": "https://github.com/modelcontextprotocol/conformance",
   "scripts": {
     "start": "tsx src/index.ts",
     "test": "jest",